Last Updated
：2025/11/20
rock-dumb
Adjective
derogatory
rare
slang
Japanese Meaning
非常に愚か、不合理な行動をとるほど馬鹿であること / 極端に知能が低い、ばかげた行動を示す
Sense（1）
Quizzes for review
(rare, slang, derogatory) Extremely stupid.
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See correct answer
rock-dumb
That rock-dumb idea cost us the contract and left everyone speechless.
See correct answer
That rock-dumb idea cost us the contract and left everyone speechless.
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