JMdict: 2197810

無駄口をたたく 【むだぐちをたたく】

  1. [exp,v5k] to chatter pointlessly; to waste one's breath
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
無 Nothingness, None, Ain't, Nothing, Nil, Not ム, ブ な.い
駄 Burdensome, Pack Horse, Horse Load, Send By Horse, Trivial, Worthless ダ, タ
口 Mouth コウ, ク くち