scum

1. N-PLURAL If you refer to people as scum, you are expressing your feelings of dislike and disgust for them. 令人厭惡的人[非正式]

She never would have even spoken to scum like him when Mom was alive. 媽媽活著的時候她是絕不會和像他這樣令人厭惡的人說話的。

2. N-UNCOUNT Scum is a layer of a dirty or unpleasant-looking substance on the surface of a liquid. (液體表面的) 浮垢

...scum marks around the bath. …浴缸周圍的垢跡。