口角

kǒu jiǎo hán xiào

口角含笑

have a faint smile playing about the corners of one's mouth

kǒu jiǎo liú xián

口角流涎

slobber

zhè ge kǒu jiǎo yóu wù huì yǐn qǐ

这个口角由误会引起。

The quarrel originates in a misunderstanding.

kǒu jiǎo shēng fēng

口角生风

speak fluently