scum

/skʌm/

名词

（液体上的）浮沫，浮渣，浮垢
The lake near the factory was covered with grey, foul-smelling scum.
这家工厂附近的湖面上浮着一层灰蒙蒙、散发着臭气的浮垢。
人渣；败类
People who organize dog fights are scum in my opinion!
我认为那些组织斗狗的人是人渣！