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
Zedong	-	Chinese
Iwan	EE-wan (Welsh), EE-vahn (Polish)	Welsh, Polish
Nikandros	-	Ancient Greek
Pau	-	Catalan, Occitan
Balliol	['beiljəl]
Niels (1)	NILS	Danish