
Off your nut
Use Caution
It's an informal phrase that might be offensive; use it carefully depending on your company.

I wouldn't say your boss is off his nut - that could sound disrespectful.
Emotional Punch
The phrase often conveys strong feelings about someone's behavior, usually disapproval or shock.

He started dancing on tables; we thought he was off his nut!
Not for Formal Use
Avoid this slang in formal contexts; it's suited to casual conversations among friends.

You wouldn't tell your grandmother she's off her nut for forgetting her keys.
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