scum
noun /skʌm/
/skʌm/
- [uncountable, singular] a layer of bubbles or an unpleasant substance that forms on the surface of a liquid
浮沫；浮垢；浮渣 - Skim off any scum.
撇净浮沫。 - stinking water covered by a thick green scum
盖着厚厚一层绿色浮垢的臭水
- Skim off any scum.
- [uncountable, plural] (informal) an offensive word for people who you think are very bad
（骂人的话）渣滓，败类 - Don't waste your sympathy on scum like that.
对这样的渣滓你没必要同情。 - Drug dealers are the scum of the earth (= the worst people there are).
毒品贩子是社会渣滓。
- Don't waste your sympathy on scum like that.
词源Middle English: from Middle Low German, Middle Dutch schūm, of Germanic origin.