nut case

nutcase

1. offensive slang A derogatory term for someone who is insane or psychotic. Some nutcase went rambling through the mall this morning, screaming incomprehensibly at anyone who went near him. My step-father threatened to have me locked away with the other nutcases in the asylum.
2. slang An eccentric, wild, or unorthodox person. You're such a nutcase, Tim—I can't believe you ate the entire thing by yourself! My whole family thinks I'm a bit of a nutcase because I practice holistic medicine. My friend Jake is a total nutcase, always pulling the most reckless, crazy stunts.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

nut case

Fig. a crazy person; an irrational person. Bob is acting stranger and stranger. He is turning into a real nut case.
See also: case, nut
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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