洋葱男

Womanizer 洋葱男 yáng cōng nán

The expression is coined by comparing a womanizer to an onion. In a word, the guy is a gutless and senseless man who treats every girl like they're the girl for him, then lets them down by having many other girls on the side.

A womanizer generally uses layer after layer of sweet words and other deceiving tactics to seduce a woman. In the end, the romance comes to nothing, leaving the woman in tears when she finds out the truth.