Slang words: O

359 slang and Internet words starting with O, each with its slang meaning. Trending slang

o algoOr something.
O'Malley's AlleyThe Los Angeles Memorial Coliseum.
O.O.A brief glance or visual examination (typically of a person).
OAerA member of the Order of the Arrow.
OaktownOakland (a city in California).
oat sodaBeer.
ob-Obligatory; prepended to the name of a topic being mentioned to avoid accusations of being off-topic.
ObamacanA member of the U.S. Republican Party who supports or supported the election of Barack Obama as president.
ObamaCareAny of various healthcare plans seen as associated with Barack Obama before or during his tenure as U.S....
ObamaconA conservative (especially a Republican) who supports or supported the election of Barack Obama as president.
ObamamaniaFervent admiration of Barack Obama.
ObamanomicsThe economic policies of Barack Obama.
ObamericaThe parts of the United States of America where Barack Obama finds high support; Obama’s geographical support...
ObamnaNickname for Barack Obama (born 1961), 44th President of the United States.
obboPolice observation.
OBHWFThe double ship of Hermione Granger/Ron Weasley and Harry Potter/Ginny Weasley from the Harry Potter series.
object campA subgenre of online reality games, typically based around object shows, where players take the role of...
object showAn animated web series starring a cast of simply drawn anthropomorphic objects, typically depicting a...
objectsonaAn object alter-ego or self-insert character; a persona which is an inanimate object.
obliteratedVery drunk or intoxicated; wasted.
obsPolice observation.
obscurificationThe act of making something obscure, or (in computing) obfuscating source code etc.
obseshObsession.
occhiolismThe awareness of the small scope of one's own perspective and the way it limits one's ability to fully...
occyAn octopus (sea creature).
ochreMoney, especially gold.
ockerA boorish or uncultivated Australian.
ockyHaving large, well-developed muscles.
octoAn octopus (safety device).
October 8th JewA Jewish person who reconnected with their Jewish identity as a result of the Hamas-led attack on Israel on...
October TheoryA social media concept stating that October acts as a second New Year's Day or that autumn is the ideal time...
odd bodA temporary crew member who joins a mission with an established crew.
odeAn odonate; a dragonfly or damselfly.
odeeVery, extremely.
OdyseeAn American blockchain technology online video content steaming service website.
oekakiA drawing-based message board system, sometimes allowing users to replay a stroke-by-stroke animation of the...
of course my horseSynonym of of course.
of cozOf course.
offTo kill.
off like a bride's nightieMaking a rapid departure; away.
off like a dirty shirtGoing away; taking one's departure.
off like a prom dressMaking a start, or departing, very rapidly.
off one's blockCrazy; insane.
off one's boxCrazy; unhinged; irrational.
off one's faceExtremely intoxicated, either by alcohol or drugs.
off one's onionCrazy; insane.
off one's rockerCrazy; insane.
off tapOstracized and made the target of revenge or punishment.
off the beamCrazy; insane.
off the chainCrazy and exciting; delirious and wild.
off the heezyA basketball move in which the ball is bounced off of an opponent's head.
off the hizzleOff the hook, fresh, awesome, cool, excellent.
off the hizzyOff the top of one's head, by improvision rather than preparation.
off the hookFresh, cool, trendy, excellent, incredible.
off the nutIn deficit, not profiting; sustaining a loss.
off the ripFrom the very beginning; immediately; right away.
offbeatAn unconventional person, someone who does not follow the beat, who chooses not to conform.
officeInside information.
OfficegateA 2001 controversy leading to the resignation of Henry McLeish, First Minister of Scotland, who had illicitly...
officiallyThoroughly, completely.
offlineOutside the current meeting, in a more private setting.
offlineableCapable of being used offline to some degree.
offlistNot on a mailing list or newsgroup.
offshorizationThe act of moving capital to offshore accounts, or relocating business to a foreign country with a more...
offsideOut of bounds.
offyAn off-licence.
oh em geeAn exclamation of excitement, surprise, amazement, or shock.
oh noesOh no.
oh wormExclamation of surprise or disbelief.
oh, dipAn expression of mild surprise or annoyance.
OhiahOhio.
oi oiHey; look; drawing attention to something.
oi oi saveloyA greeting.
oignon vertMeter maid.
oikA member of the lower classes.
oil bugA microfossil, particularly a foraminiferan.
oil burner routeA region of airspace in which military jets are authorized to carry out low-altitude training.
oil of palmSynonym of palm oil (“money”).
oiledDrunk. Usually in conjunction with an adverb of degree.
oilerA heavy drinker; especially, an alcoholic.
oily-wadAn oil-powered torpedo boat.
oink outTo eat greedily; to pig out.
oinkerA pig: an animal of the genus Sus.
okeMan; guy; bloke.
OkudagramAny of the distinctive interactive computer displays associated with Starfleet technology in Star Trek.
oldA person older than oneself, especially an adult in relation to a teenager.
old bangerA decrepit car.
old beanAn old friend; an old chap or fellow.
Old BillA police officer.
Old BlightyGreat Britain, Britain, or England, especially as viewed from abroad.
old codgerAn old man.
old fingerOne's father.
old fruitAn old friend; an old chap or fellow.
old headAn older male gangsta or thug, especially one who is no longer active; an older black man with street cred.
old ladyOne's mother.
old manOne's male employer, irrespective of age.
old man yaoiThe shipping together of two elderly or middle-aged men.
old ralSyphilis.
old soldierThe butt of a smoked cigar, or an empty bottle of liquor.
Old SparkyNickname for an electric chair used for executions.
old sweatA veteran soldier or war veteran.
old womanOne's wife.
old-oldA person aged 75 or older.
oldbieAn old-timer, a person with experience.
oldgenA veteran user or participant; someone who is experienced (in a game or activity).
oldheadA longtime hobbyist, fan or user; a veteran.
oldsOne's parents.
OldsmobileA lowball hand with a nine and an eight as the two highest cards.
oleogustusA proposed basic taste sensation triggered by fatty acids.
olgolianA person from Bosnia and Herzegovina.
OlicityThe ship of characters Oliver Queen (Green Arrow) and Felicity Smoak from the television series Arrow.
OlitzThe ship of characters Olivia Pope and Fitzgerald "Fitz" Grant from the television series Scandal.
OlympicFive consecutive ducks.
om nom nomTasty food.
omegaIn omegaverse fiction, a person of a submissive secondary sex driven by biology, magic, or other means to...
Omega variantA hypothetical, extremely virulent strain of the SARS-CoV-2 virus that causes COVID-19.
omegalulLOL.
omegaverseA subgenre of erotic speculative fiction set in this fictional universe.
omgOh my God.
OMGWTFBBQAn exclamation of extreme surprise or excitement (usually facetious, sarcastic, or exaggerated).
omniapanA theoretical member of all amateur press associations.
omniboxAn enhanced address bar in a web browser that can also accept certain text commands.
omnicauseThe hypothesised relation of major political causes and issues, especially in the context of such relatedness...
on a missionLooking for drugs; on a drug run.
on and poppingLively and full of action or excitement.
on blastIn an embarrassing position from having been publicly denounced or exposed, especially from being shamed on...
on dead dogsUsed to express that the speaker is telling the truth.
on fleekFlawless; perfect; spot on.
on foenem graveWith all honesty and earnestness; with placement of a claim’s validity upon the honor of one’s deceased kith...
on GodWith all honesty and seriousness, used to stress that one is telling the truth.
on iceDead, especially from murder or other nefarious means.
on JahSynonym of on God.
on jobVery hardworking; dedicated to the hustle.
on like Donkey KongAn intensifier used in the same contexts as it's on, bring it on, come on, go on, and other expressions using...
on mainExpressed openly when one might normally desire privacy or anonymity.
on my lifeWith all honesty and seriousness; affirmatively.
on one's Jack JonesOn one's own; alone.
on one's onesOne one's own.
on one's Pat MaloneAlone, on one's own.
on paperOf a convicted criminal: on parole.
on sightCause for a fight, immediately upon encounter without deliberation.
on skibidiWith all honesty and earnestness, really; no cap; on God.
on the bashWorking as a sex worker.
on the batterEngaged in prostitution.
on the beatSynonym of on the game (“working as a prostitute”).
on the boobBreastfeeding, nursing at the breast.
on the brewOn the dole; receiving unemployment benefit.
on the bumLiving as a vagrant; homeless.
on the bungNot working properly; kaput.
on the clubTemporarily away from work, usually due to sickness, supported by sickness benefit.
on the down-lowSecretly sleeping with someone other than one's partner.
on the earieListening or eavesdropping; staying alert for news.
on the fiddleEngaged in financially dishonest behaviour.
on the flyOn the move.
on the gameWorking as a prostitute.
on the gripping handFrom a third point of view.
on the grogDrinking alcoholic beverages to excess.
on the hog trainLeading a life or an existence as a tramp or a vagrant, or traveling as such.
on the hopPlaying truant from school.
on the hurry upAt top speed; as fast as possible.
on the hustleMaking a living, or supplementing one's living, by petty crime.
on the jobHaving sex.
on the lashOut drinking socially; usually involving heavy alcohol consumption.
on the mopGetting drunk; taking part in a session of drinking alcohol.
on the needleIn the habit of taking recreational drugs intravenously.
on the nickEngaged in theft.
on the nodIn a stuporous state following a high from heroin.
on the noseSmelly; malodorous.
on the nutNot in deficit, profiting; making money.
on the other pawSynonym of on the other hand.
on the padTaking regular bribes.
on the pdqIn a speedy or fast manner.
on the pullOut seeking a sexual partner.
on the razzOut getting drunk.
on the razzleOut getting drunk.
on the razzle-dazzleOut getting drunk.
on the roadNot in prison.
on the robEngaged in theft.
on the sauceDrinking alcoholic beverages to excess.
on the tackWithout alcohol; teetotal.
on the tapBegging, making requests for loans.
on the trotOn the run; fleeing.
on the turfSynonym of on the game (“working as a prostitute”).
on the turpsDrinking alcohol to excess.
on the wallaby trackOut of work; unemployed.
on wheelsTo a large degree, excessively.
on your bikeGo away.
on your horse, amigoHow are you?
one brick short of a full loadNot mentally sound; insane.
one eighty outIncorrect; false.
one fry short of a Happy MealMad, deranged, insane.
one guyA single chatter or message that a streamer wrongly believes is representative of a chat or consensus.
one more againOne more time; once again.
one underA person under a train; a person hit by a train after jumping or falling in front of it.
one-and-doneA basketball player who plays college basketball for a single year and then declares for the NBA draft.
one-arm jointSynonym of one-arm lunchroom.
one-arm lunchroomA diner serving snacks and simple meals.
one-arm restaurantSynonym of one-arm lunchroom.
one-baggerA single (a one-base hit).
one-banana problemA problem that should be easily resolved.
one-eyed jackEither the jack of spades or jack of hearts, on which the jack is commonly depicted in profile.
one-eyed kingThe king of diamonds in a deck of playing cards.
one-hit wonderAn instance of achieving a high from the first hit.
one-hitterA cannabis pipe for a single inhalation.
one-holerAn outhouse with a single hole.
one-minute manA man who suffers from premature ejaculation.
one-pumpAn instance of one-pumping.
one-shotA fanfic of only one chapter.
one-spotSynonym of buck (“a dollar (one hundred cents)”).
one-tapTo kill (an enemy) in one shot.
one-throatTo eat quickly and with minimal chewing, especially if to the point of swallowing food whole.
one-timeThe police.
oneitisAttraction towards a single potential partner to the exclusion of other possible partners.
onesThe cells located on the ground floor.
ones and twosTurntables used by DJs.
oneshotTo rapidly overwhelm and gain influence over (someone).
onionSoy, particularly when used in compound words related to the soy boy stereotype.
onion bagThe goal net.
onion bootyLarge, attractive female buttocks.
OnionlandThose portions of the Internet accessible via onion routing.
onkusInferior; unpleasant; unacceptably bad.
onlineImmersed in Internet culture. (Usually modified by an intensifier such as extremely or terminally).
online reality gameAn online game, typically based around a reality show, that stars a cast of real people competing in a game...
online service providerAny company, organization, or group that provides services over the Internet, including web hosting, Internet...
only in OhioSaid in response to witnessing something violent, cringe-inducing, or absurd.
onoGood-tasting, delicious.
onsideWithin bounds.
onyaGood on you.
oofSynonym of ouch (“expressing sympathy at another's pain, shock at a high price, etc.”).
oof-birdAny source or supplier of money.
oofinessThe quality of being wealthy.
ooflessShort of money; poor.
oofyHaving lots of money rich, wealthy.
ooga boogaA frightened or sarcastic imitation of foreign language.
ooh, matronHighlights a statement which contains a double entendre or appears sexually forward.
oojahSomething whose name is unknown or unimportant; a thingy; a whatsit.
oojibooAn unspecified object; thingy; whatsit.
oomfchellaA gathering of friends, especially online friends meeting offline.
oomskaFilth, dirt.
oontzImitating an electronic drum sound.
oontzyCharacteristic of oontz music, with prominent electronic drum sounds.
oops babyA child born as the result of an unplanned pregnancy.
oowopAn uzi submachine gun.
opTo promote (an IRC user) to an operator.
open it upTo speed up; to gun it.
open rateA measure used by marketers as an indication of how many people "view" or "open" the electronic mail they...
open speciesA species of furry that is open source, not copyrighted by its creator; a fictional furry species that anyone...
open the schoolsExpressing that someone is wrong or misinformed, especially where something should be widely understood (e.g....
operA network operator on IRC.
operatorA major criminal.
oplessWithout ops (channel operators).
oppAn opponent; an enemy; the opposition.
oppaiA woman's breasts, particularly of an anime or manga character.
oppai loliA character in fiction with the frame of a loli but with a disproportionately large chest.
oppingThe promotion of an IRC user to operator status.
oppoA friend, associate or colleague.
oppyCharacteristic of an opp; inimical, hostile.
OprahizationSynonym of Oprahfication.
opsOperator status.
or it didn't happenUnless one can provide the proof that one is requesting, that person has no credibility in the matter.
orang China bukan ChinaA mixed-race person with one Chinese parent.
orange peel theoryThe idea that a relationship is strengthened by seemingly minor acts of service for one's partner, such as...
orange pillA notional pill taken by those who have become dedicated to investing in Bitcoin.
orange sunshineLysergic acid diethylamide produced in California in the late 1960s in the form of orange tablets.
orbitingThe act or practice of ceasing communication with another person, but continuing to follow them or interact...
ordieOrdnance operative.
organ donorA motorcyclist, especially one who does not wear a protective helmet.
organicGenerated according to the ranking algorithms of a search engine, as opposed to deliberate promotional...
organivoreAn enthusiast of organically grown/raised food, with an entirely or mostly organic diet.
original characterA fictional character created by an author or artist, usually one from a fanwork that is not present in the...
original ficFiction not based on any pre-existing property or franchise; an original work of fiction.
oriteOh, right; an acknowledgment of understanding.
orphan pageA webpage that is not accessible from any other page on a website, and can only be accessed by entering the...
orphan-crushing machineA notional machine representing a system or state of affairs that obviously facilitates suffering but is not...
Oscar AscheCash; money.
osmAwesome; like OK, can be used to express enthusiastic approval.
ossifiedDrunk.
ossomAwesome.
OT3One true threesome; a polyamorous ship involving three characters that is a personal favorite of a fan.
otakuOne with an obsessive interest in something, particularly (originally derogatory) an obsessive Japanese fan...
otakukinA person who claims or believes that their soul is a reincarnation or parallel incarnation of a fictional...
OtamatoneAn electronic musical synthesizer.
otaxA hoax or apocryphal Discord exploit popularized by Larpercore groups (specifically "Hells Angels"), claimed...
other sideThe other television channel (when only two were available).
otokonokoA male who has extremely feminine appearance and mannerisms.
otrovertA person who is unable to feel a connection to social groups or collectives, as distinct from both an...
ottAn otter.
otterA hairy man with a slender physique, in contrast with a bear, who is more thickset.
ottermodeA lean and physically-fit physique with well-defined muscles.
ottersonaA fursona that is an otter.
ottertaurA taur with the lower body of an otter.
oubliationThe state of being imprisoned in an oubliette.
ouchExpressing surprise at the high price of something.
ouidFilter-avoidance spelling of weed (“marijuana”).
ousieA black woman, especially one who works as a maid.
outUsed as a brusque or dramatic farewell.
out of collarUnemployed; out of work.
out of harnessSynonym of out of collar (“unemployed; out of work”).
out of one's gourdCrazy; unhinged; irrational.
out of one's treeCrazy; unhinged; irrational.

Slang meanings adapted from the Wiktionary entry of each word (English slang). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws chose the words, left out vulgar and offensive ones, and linked each to its full entry. Wiktionary data of 2026-09-02.

Cite this page: “Slang Words Starting with O.” Word.ws, https://word.ws/slang/o. Based on Wiktionary, CC BY-SA 4.0.

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