be off (one's) chump



be off (one's) chump

To be crazy. In the UK, "chump" is a slang term for "head." Primarily heard in UK. You're off your chump if you think that plan will work.
See also: chump, off

Common Names:

NameGenderPronouncedUsage
TerahTEE-rə (English)Biblical
Sollemnia-Late Roman
Sumon-Bengali
Raginhard-Ancient Germanic
Barack-Arabic
Jacobs['dʒeikəbz]