off your nut

off (one's) nut

Crazy or insane. I think you're off your nut for changing careers this late in life, but, hey, follow your dreams. He's off his nut if he thinks he can get that engine fixed by this weekend.
See also: nut, off
Farlex Dictionary of Idioms.

off your nut

out of your mind; crazy. informal
See also: nut, off
Farlex Partner Idioms Dictionary

ˌoff your ˈnut

(British English, informal, spoken) crazy: Is he completely off his nut?
Nut is an informal word for your head.
See also: nut, off
Farlex Partner Idioms Dictionary
See also:
  • off (one's) nut
  • off one’s nut
  • be off (one's) nut
  • off one's head, rocker, etc.
  • (I've) got to take off
  • be off (one's) chump
  • be off (one's) trolley
  • be off (one's) rocker
  • be off for (something)
  • be off for sth
References in periodicals archive
Katie looked annoyed as Peter declared: "You probably don't remember because you're off your nut!"
So, if you'd told me back in 1992 that I'd have been cheering on a John Major TV appearance, I'd have assumed you were a) the world's worst clairvoyant or b) completely off your nut.
"If you'd said then we'd be playing together now, I'd have said you were off your nut.
lSome style, Big Man - off your nut and not scared to tell the world.
"If you'd said then that we'd be playing together now, I'd have said you were off your nut. He's the best keeper in the world at the moment in my opinion and I can only learn from him."
TOLD Pete to chat to Lisa, "What's the worst she'll do, rip off your nuts and shove 'em down your