Word.ws English Dictionary

knock oneself out

knock oneself out verb: to go ahead; to do as one pleases; to enjoy oneself; to endeavor very hard at a task.

Verb

knock oneself out (third-person singular simple present knocks oneself out, present participle knocking oneself out, simple past and past participle knocked oneself out)

  1. (idiomatic, informal) To go ahead; to do as one pleases; to enjoy oneself; to endeavor very hard at a task.
    • "These cookies are my favorite! Can I have some?" "Sure, knock yourself out." (i.e., have as many as you want)
    • (sarcastically, indicating lack of interest) "I'm going to the store." / "Knock yourself out."

Forms of knock oneself out

third-person singular presentknocks oneself out
present participleknocking oneself out
past participleknocked oneself out
pastknocked oneself out

Questions about knock oneself out

What does knock oneself out mean?
Knock oneself out means to go ahead; to do as one pleases; to enjoy oneself; to endeavor very hard at a task.
What part of speech is knock oneself out?
Knock oneself out is a verb.
What is the past tense of knock oneself out?
The past tense of knock oneself out is knocked oneself out.

Words near knock oneself out in the dictionary

  1. knock on wood
  2. knock one out
  3. knock one out of the ball park
  4. knock one out of the ballpark
  5. knock one out of the park
  6. knock oneself out
  7. knock out
  8. knock out of the box
  9. knock over
  10. knock round
  11. knock rummy

Source and license

Adapted from Wiktionary: knock oneself out (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: En-au-knock oneself out.ogg.

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