adj.满是浮渣的,浮渣般的,下流的;
例句:
That's a scummy trick.
那是一种卑鄙的伎俩.
I don't like walking through the scummy part of town.
我不喜欢走过城里的下层居民区.
scummy people dropping litter
不讲公德、乱丢杂物的人