腹はら黒ぐろい

i-adjective

mean; malicious; scheming; black-hearted

Describes a person who appears kind or innocent on the outside but harbors ill intentions or selfish schemes. Often used critically.

• 彼かれは笑え顔がおの裏うらで腹はら黒ぐろいことを考かんがえている。

  Behind his smile, he's thinking malicious thoughts.

• あの人ひとは腹はら黒ぐろいから気きをつけたほうがいい。

  That person is scheming, so you'd better be careful.