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
Anri-Georgian
NemesisNEM-ə-sis (English)Greek Mythology
TjaardTYAH:RT (Dutch)Frisian, Dutch
Oluwakanyinsola-Western African, Yoruba
Koray-Turkish
EulÀLia-Catalan