out of (one's) tree

slang Crazy. After yet another sleepless night, I'm starting to feel like I'm out of my tree. He's out of his tree if he thinks this plan is going to work!

Common Names:

Name	Pronounced	Usage
Andrei	ahn-DRYAY (Russian)	Romanian, Russian, Bulgarian, Old Church Slavic
Diamond	['daiəmənd]
Barth	[ba:θ]
Giosetta	jo-ZET-tah	Italian
Yoana	-	Bulgarian
Hruodnand	-	Ancient Germanic