撕破臉

Simplified: 撕破脸

sīpòliǎn ㄙ ㄆㄛˋ ㄌㄧㄢˇ

    • to have an acrimonious falling-out
    • to shed all pretense of cordiality
    • to tear into each other

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
tear the face
Meaning
To break with someone and drop all politeness. Comparable to "things get ugly".

Sources