[ U ] a layer of unpleasant or unwanted material that has formed on the top of a liquid: （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。 SMART Vocabulary: related words and phrases Rubbish and waste activated sludge anti-litter anti-littering debris dejunk garbage garbage disposal gubbins high-level waste influent litter muck rubbish sewerage shavings skip diving slag spoil tat white elephant
scumnoun (IMMORAL PERSON)
[ C or U ]informalpluralscum a very bad or immoral person or group of people: 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！ His boss treats him like scum (= very badly).他老板不把他当人看。 racist scum种族主义暴徒
Related word
scummy
Idiom
the scum of the earth
scum | American Dictionary
scum noun[ U ] us/skʌm/ a thin layer that forms on the surface of a liquid: The tea was nasty-tasting stuff that looked like pond scum. I wish you wouldn’t leave soap scum in the bathtub.