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
Titilayo	-	Western African, Yoruba
Ziauddin	-	Arabic
GintarĖ	-	Lithuanian
Alvina	al-VEEN-ə	English
Junko	joon-ko	Japanese
Fuller	[fulə]