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
YİĞİT	yee-YEET	Turkish
Magni	-	Ancient Scandinavian, Norse Mythology
Ping	-	Chinese
FÜLÖP	-	Hungarian
Zuan	-	Medieval Italian
Godelieve	kho-də-LEE-və	Dutch