嘴角痞笑
[zuĭ jiăo pĭ xiào]
The meaning is similar to '浪泽痞子', emphasizing a certain facial expression or personality trait. Specifically referring to 'A Smirk on One's Face', conveying that this kind of person seems rather cool or even cynical. They won't easily express joy, instead showing arrogance or indifference, or being humorous, mischievous at times.