(as) dumb as a post

(as) dumb as a post

Very stupid. You took apart the entire washing machine just to unblock the pump? I swear, sometimes you can be as dumb as a post, Larry. I used to think she was dumb as a post when we were kids, but she grew up to be a particle physicist. Are you dumb as a post? Why would you touch the alarm when the sign clearly says "DO NOT TOUCH" in bold red letters?
See also: dumb, post
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

dumb as a post

AMERICAN, INFORMAL
If you describe someone as dumb as a post, you mean that they are very stupid. She's one of the most famous physicists in the country, and she's dumb as a post!
See also: dumb, post
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
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