off one’s chump

mod. crazy; nuts. Am I off my chump, or did that car suddenly disappear?

Name	Pronounced	Usage
Phobos	FO-bos (English)	Greek Mythology
Legolas	-	Literature
Jaroslava	-	Czech, Slovak
Ross	[rɔs]
Hila	-	Hebrew
Nathanael	nay-THAN-ee-əl (English), nay-THAN-yəl (English)	Biblical, Biblical Greek