Word.ws English Dictionary

dumber than a rock

dumber than a rock adjective: extremely stupid.

Adjective

dumber than a rock (comparative form only)

  1. (comparative-only) Extremely stupid.

Questions about dumber than a rock

What does dumber than a rock mean?
Dumber than a rock means extremely stupid.
What part of speech is dumber than a rock?
Dumber than a rock is an adjective.

Words near dumber than a rock in the dictionary

  1. dumbening
  2. dumbens
  3. dumber
  4. dumber than a bag of hammers
  5. dumber than a box of rocks
  6. dumber than a rock
  7. dumber than a sack of bricks
  8. dumber-ass
  9. dumberass
  10. dumbest
  11. dumbest ass

Source and license

Adapted from Wiktionary: dumber than a rock (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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