JMdict: 2648900

脳筋 【のうきん】

  1. [n] muscle-brain; meathead; hot-blooded idiot; person who charges in before thinking
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
脳 Brain, Memory ノウ, ドウ のうずる
筋 Muscle, Sinew, Tendon, Fiber, Plot, Plan, Descent キン すじ