心しん臓ぞうに毛けが生はえた

expression

brazen-faced; shameless; thick-skinned

Idiomatic expression describing someone who is utterly shameless or audacious, as if their heart were covered in hair. Often used in a critical or exasperated tone.

• あんな嘘うそをつくなんて、心しん臓ぞうに毛けが生はえたやつだ。

  Telling a lie like that—what a brazen-faced guy.

• 彼かの女じょは心しん臓ぞうに毛けが生はえたように平へい然ぜんとしていた。

  She remained completely unruffled, as if she had no shame at all.