off one's onion
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Crazy; insane.
Register: slang
Where it’s used:
Used
American English
Examples
'E's a very clever man, the master - so clever that 'e's clean balmy sometimes. I've seen 'im right off 'is onion, and no error.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “off one's onion” mean?
Crazy; insane.
Is “off one's onion” formal or informal?
off one's onion is generally slang.