Meanings
adjectivedumber than a rock (comparative form only)
- comparative onlyExtremely stupid.
Synonyms & antonyms
Also see
Cite this entry
APA
dumber than a rock. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/dumber%20than%20a%20rock
MLA
“dumber than a rock.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/dumber%20than%20a%20rock. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “dumber than a rock,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/dumber%20than%20a%20rock.
Source: dumber than a rock on Wiktionary, CC BY-SA 4.0.