Definitions from Wiktionary (rock-dumb)
▸ adjective: (rare, slang, derogatory) Extremely stupid.
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▸ adjective: (rare, slang, derogatory) Extremely stupid.
Similar:
dumb,
dumbassed,
dumb as a bag of hammers,
dumbshit,
stupidass,
dumb as a sack of hammers,
rockheaded,
dickheaded,
shit-for-brains,
special,
more...
Opposite:
▸ Words similar to rock-dumb
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▸ Wikipedia articles (New!)
▸ Popular nouns described by rock-dumb
▸ Words that often appear near rock-dumb
▸ Rhymes of rock-dumb
▸ Invented words related to rock-dumb