ˈpond scum noun [uncountableU] 1 American EnglishAmE informal someone that you do not like, respect, or trust 坏坯,败类 He’s lower than pond scum. 他这人猪狗不如。
2. algae 藻;海藻
pond scum• Bernie's nothing but pond scum. You don't need him.• Borden Stoppelgard is pond scum, Bernie.