off (one's) 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. © 2022 Farlex, Inc, all rights reserved.

*off one's rocker

 and *off one's nut; *off one's trolley
Fig. crazy; silly. (*Typically: be ~; go ~.) Sometimes, Bob, I think you're off your rocker. Good grief, John. You're off your nut.
See also: off, rocker
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

off your nut

out of your mind; crazy. informal
See also: nut, off
Farlex Partner Idioms Dictionary © Farlex 2017

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 © Farlex 2017

off one’s nut

1. mod. crazy; out of one’s head. Don’t pay any attention to her. She’s off her nut.
2. mod. alcohol intoxicated. Those guys are so off their nuts!
See also: nut, off
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

off (one's) rocker

Slang
Out of one's mind; crazy.
See also: off, rocker
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also: