riffraff
US /ˈrɪfˌræf/
UK /ˈrɪfˌræf/
名词
乌合之众, 社会渣滓, 下层人
disreputable or undesirable people
示例:
•
The security guard prevented the riffraff from entering the exclusive club.
保安阻止乌合之众进入这家高级俱乐部。
•
She didn't want to associate with the local riffraff.
她不想与当地的乌合之众为伍。