心しん臓ぞうに毛けが生はえている

expression, ichidan verb

shameless; brazen; thick-skinned

Idiomatic expression literally meaning 'to have hair growing on one's heart', used to describe someone who is shameless, audacious, or has a lot of nerve. Often used in a critical or exasperated tone.

• あんな失しっ敗ぱいをしておいて、よく平へい気きでいられるね。心しん臓ぞうに毛けが生はえているよ。

  After making such a mistake, how can you act so calm? You've got some nerve.

• 彼かの女じょは初しょ対たい面めんの社しゃ長ちょうに直ちょく接せつ文もん句くを言いうなんて、心しん臓ぞうに毛けが生はえているとしか思おもえない。

  She complained directly to the company president on their first meeting; I can only think she's incredibly brazen.