be out of (one's) tree

slang To be 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
Rosette	-	French
Kettil	-	Swedish
WarcisŁAw	-	Polish (Archaic)
Lila (1)	-	Indian, Hindi
Isadora	-	English
Renata	re-NAH-tah (Italian, Spanish, German, Polish)	Italian, Spanish, Portuguese, German, Polish, Czech, Croatian, Slovene, Late Roman