N-COUNT
（竞争、竞赛等中的）劣势方，弱者
The underdog in a competition or situation is the person who seems least likely to succeed or win.
例句
Most of the crowd were cheering for the underdog to win just this one time.
人群里的大多数人都在为劣势一方鼓劲，希望他哪怕就赢这一次。
...Webb, the underdog in this race.
在这次比赛中处于劣势的韦伯