The story
See chump (“the head”), and compare off one's head.
Etymology from Wiktionary, CC BY-SA 4.0.
off one's chump
Today it means: Crazy, insane. Full definition →
Today it means: Crazy, insane. Full definition →
See chump (“the head”), and compare off one's head.
Etymology from Wiktionary, CC BY-SA 4.0.