biàn​liǎn

to turn hostile

变脸 變臉 biàn//liǎn
to turn hostile
To suddenly change one's facial expression to show anger; to turn hostile or cold toward someone unexpectedly.
face changing
The traditional art of face changing in Sichuan Opera, where performers quickly switch masks or makeup to reflect emotional shifts.

Frequency

Movie subtitles
0.390 per million appears in 0% of films
Written text
3.27 per million

Sources