litterbug /ˈlɪtəˌbʌg/

• 1. 

  N-COUNT If you accuse someone of being a litterbug, you mean that you disapprove of the fact that they drop litter in public places. 随地乱扔的家伙 [表不满]

  例：

  ...a city full of litterbugs.

  ...一座充斥着乱扔垃圾的家伙们的城市。