fifth wheel
多余的人或物
口語·形容多余或累贅
英文釋義
someone or something that is unnecessary, redundant, or superfluous in a particular situation
例句
I felt like a fifth wheel at their couple's dinner.
典故來源
源自馬車上的第五個輪子,實際無用,比喻多余或無關緊要的人或物。