厚顔こうがん無恥むち
kōgan muchi

Noun
na-Adjective

1. shameless; brazen and unscrupulous

Yojijukugo
厚顔こうがん無恥むちとはまさにあいつのことだ。
kōgammuchitowa masani aitsuno kotoda.
He's such a shameless jerk.