(as) crazy as a bedbug

(as) crazy as a bedbug

Insane. Often used jocularly. Primarily heard in US. Don't leave me alone with Uncle Stu, he's crazy as a bedbug! I know some of my students think I'm as crazy as a bedbug because of my weird methods. You're as crazy as a bedbug if you believe this ridiculous scheme will work.
See also: bedbug, crazy
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

crazy as a bedbug

AMERICAN, INFORMAL
If you describe someone as crazy as a bedbug, you mean that their behaviour is very strange or silly. By now she'd concluded that Peters was crazy as a bedbug. Note: Bedbugs are small wingless insects that live in beds and bedding. They feed by biting people and sucking their blood.
See also: bedbug, crazy
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
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