Word.ws English Dictionary

known one's onions

known one's onions is the past participle of know one's onions.

Meaning of know one's onions

Verb

know one's onions (third-person singular simple present knows one's onions, present participle knowing one's onions, simple past knew one's onions, past participle known one's onions)

  1. (informal) Synonym of know one's stuff: to be knowledgeable about a given subject or task.
    • Joe really knows his onions when it comes to cooking.

Questions about known one's onions

What is known one's onions the past participle of?
Known one's onions is the past participle of know one's onions.

Words near known one's onions in the dictionary

  1. known one's arse from one's elbow
  2. known one's ass from a hole in the ground
  3. known one's ass from one's elbow
  4. known one's head from a hole in the ground
  5. known one's head from one's ass
  6. known one's onions
  7. known one's own head
  8. known one's own mind
  9. known one's place
  10. known one's shit
  11. known one's stuff

Source and license

Adapted from Wiktionary: known one's onions (page history and authors); know one's onions (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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