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
GrÁInne	GRAWN-ya	Irish, Irish Mythology
Ingulf	-	Ancient Germanic
Farran	FAR-ən	English (Rare)
Zyanya	-	Native American, Zapotec
Hanan (2)	-	Arabic
Simion	-	Romanian