(as) dumb as a fencepost

(as) dumb as a fencepost

Very stupid. You took apart the entire washing machine just to unblock the pump? I swear, sometimes you can be as dumb as a fencepost, Larry. I used to think she was dumb as a fencepost when we were kids, but she grew up to be a particle physicist.
See also: dumb, fencepost
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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