off one’s chump

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

Name	Pronounced	Usage
Wendell	['wendl]
Yemelyan	-	Russian
Heilyn	-	Welsh
Elixabete	-	Basque
Lincoln	['liŋkən]
Raphael	ra-fa-EL (French), RAF-ee-el (English), RAY-fee-əl (English)	German, French, English, Biblical, Biblical Latin, Biblical Greek