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
Andrus	-	Estonian
Ioseph	-	Biblical Greek, Biblical Latin
Della	['delə]
Gil (2)	GIL	English
Satan	SAY-tən (English)	Theology, Biblical, Biblical Hebrew
Forbes	-	Scottish