Off her chump - Idioms by The Free Dictionary
off (one's) chump (redirected from off her chump)
off (one's) chump
Crazy or insane. He must be off his chump to pay that much money for that old car. Am I completely off my chump for starting a business in this economy?
off your chump crazy. British informal
The literal sense of chump meaning ‘a broad, thick block of wood’ led in the mid 19th century to its humorous use to mean ‘head’, with the implication of ‘blockhead’.
References in periodicals archive
New research suggests even mild exposure to the drug can cause serious psychiatric problems, and while it would be cruel and possibly libellous to describe Trisha as completely off her chump
, you couldn't say she was completely on her chump either.
My sister's pal Mabel, who is widely acknowledged to be off her chump
in any case, is an expert on the subject.