dumb as a box of rocks

adjective

Very stupid.

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Meanings

adjective(as) dumb as a box of rocks
  1. slangsimileVery stupid.

    The drummer in my friend's band is pretty hot, but he's dumb as a box of rocks. I hear he likes me, and I definitely don't want to date him—but is his stupidity any reason not to simply have sex with him? — Carla, Brooklyn, New York

    2001 July, “Tell it to my Heart”, in CMJ New Music Monthly, →ISSN, page 29

Synonyms & antonyms

Also see
not the sharpest tool in the shedstupid

Origin

Variation of dumb as a rock.

Full word history & related roots →
Cite this entry
APA

dumb as a box of rocks. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/dumb%20as%20a%20box%20of%20rocks

MLA

“dumb as a box of rocks.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/dumb%20as%20a%20box%20of%20rocks. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “dumb as a box of rocks,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/dumb%20as%20a%20box%20of%20rocks.

Source: dumb as a box of rocks on Wiktionary, CC BY-SA 4.0.