scumboard / ˈskʌmˌbɔrd, -ˌboʊrd /

📖毕业后词汇渣滓板渣滓洞渣滓岛渣滓桶

scumboard 的定义

n. 名词 noun
  1. a board or strip of material partly immersed in flowing water to hold back scum.