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
Cahya	CHAH-yah	Indonesian
&Thorn;ÓRgnÝR	-	Ancient Scandinavian
Katrina	[kə'tri:nə]
Dorthy	DAWR-thee	English
Karolina	kah-raw-LEE-nah (Polish), kah-ro-LEE-nah (Swedish, German)	Polish, Swedish, Norwegian, Danish, Hungarian, Slovene, Croatian, Macedonian, Lithuanian, German
ŽOfia	-	Slovak