dumb as a box of rocks
(simile, slang) Very stupid.
Seen in the wild
Watched GREENLAND 2: MIGRATION (2026). My goodness, this film was dumb as a box of rocks. I don't mind dumb, but not when it's as self-serious as this.
She’s either as dumb as a box of rocks, thinks WE are as dumb as a box of rocks or the worst option, she is so vicious and cynical that she is making a power mover. No way she is actually genuine.
Definitions
(simile, slang) Very stupid.
“Watched GREENLAND 2: MIGRATION (2026). My goodness, this film was dumb as a box of rocks. I don't mind dumb, but not when it's as self-serious as this.”
“She’s either as dumb as a box of rocks, thinks WE are as dumb as a box of rocks or the worst option, she is so vicious and cynical that she is making a power mover. No way she is actually genuine.”
“Watched GREENLAND 2: MIGRATION (2026). My goodness, this film was dumb as a box of rocks. I don't mind dumb, but not when it's as self-serious as this.”
— Bluesky· May 2026“She’s either as dumb as a box of rocks, thinks WE are as dumb as a box of rocks or the worst option, she is so vicious and cynical that she is making a power mover. No way she is actually genuine.”
— Bluesky· May 2026
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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Semantically related
- dumber than a box of rocks92%
(slang) Very stupid.
- dumber than a box of rocks91%
An American slang simile meaning extraordinarily stupid, describing someone whose intelligence is comparable to an inanimate collection of stones — which is to say, absent entirely. The image is deliberately absurdist and vivid: rocks have no intelligence at all, so being dumber than a box of them is a spectacular insult. Commonly heard in the American South and rural regions, it's colourful trash talk delivered with a straight face for maximum comedic effect.
- dumb as a rock83%
(US, simile) Very stupid; dumb as a post.
- dumb as dirt80%
(slang, simile) Extremely stupid.
- dumb as a doorknob78%
(simile, slang) Very stupid.