"scumbag" in Chinese (Simplified)
人渣卑鄙小人
Definition
非常侮辱性的俚语，用来形容极其不诚实、恶劣或没有道德的人。
Usage Notes (Chinese (Simplified))
极其粗鲁、冒犯，绝不适用于正式场合。常见于影视剧或激烈争吵。比“混蛋”更侮辱。不要在工作或对陌生人时用。
Examples
He called the thief a scumbag.
他叫那个小偷是个**人渣**。
Nobody likes a scumbag who cheats others.
没人喜欢**人渣**，总是欺骗别人。
Don't be a scumbag to your friends.
别对朋友做**人渣**。
After what he did, everyone thinks he's a total scumbag.
他做了那种事后，大家都觉得他完全是个**人渣**。
You trust him? That guy's a scumbag—he'd sell out his own mother!
你信他？那家伙可是个**人渣**—连自己妈妈都能出卖！
Ignore the haters—some people are just scumbags and nothing will change that.
别理那些讨厌你的人—有些人就是**人渣**，无法改变。