(as) dumb as a coal bucket
01
ものすごく頭が悪い, 常識がない
extremely unintelligent or lacking in common sense
humorous
idiom
informal
例
Do n't bother asking her for help with math. She's about as dumb as a coal bucket when it comes to numbers.
それを説明しようとしたとき、彼はものすごく頭が悪そうに見えた。



























