be off (one's) nut

slang To be crazy and/or wacky. Usually used humorously. Don't listen to a word he says, he's off his nut! You're off your nut if you think that plan will work.

Common Names:

Name	Pronounced	Usage
Mahesha	-	Hinduism
Anthea	[æn'ðiə]
Ludoviko	loo-do-VEE-ko	Esperanto
Anabela	-	Portuguese
Antonia	ahn-TO-nyah (Italian, Spanish), an-TON-ee-ə (English), ahn-TO-nee-ah (German, Dutch), ahn-TAWN-yah (Polish)	Italian, Spanish, English, German, Swedish, Norwegian, Danish, Dutch, Polish, Romanian, Ancient Roma
Hull	[hʌl]