唱白脸

Traditional (Taiwan): 唱白臉

chàngbáiliǎn ㄔㄤˋ ㄅㄞˊ ㄌㄧㄢˇ

    • to play the role of the villain (idiom)

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
to sing the white face
Meaning
To play the stern, harsh role when criticising or confronting someone, as in 'bad cop' in good cop/bad cop. Often paired with 唱红脸.

Sources