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 that kid was dumb as a post, but he turned out to be a physicist.
See also: dumb, post
Farlex Dictionary of Idioms.
dumb as a post
AMERICAN, INFORMALIf 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.
- (as) dumb as a post
- (as) dumb as a fencepost
- dumber than a doornail
- dumber
- dumber than a bag of hammers
- swear down
- swear
- the truth, the whole truth, and nothing but the truth
- I am so sure!
- I'm so sure