loser
/ˈluːzə(r)/noun
1- a person or thing that loses or has lost something, especially a game or contest（尤指游戏或竞赛）失败者。
1.1
- with adj. a person who accepts defeat with good or bad grace, as specified［与形容词连用, 依形容词的意思表示］ 输得起（输不起）的人：
we won fair and square - they should concede that bravely and be good losers.
我们赢得光明正大, 他们应当勇敢地接受失败, 做输得起的人。
1.2
- a person or thing that is put at a disadvantage by a particular situation or course of action处于不利地位的人（物）：
children are the losers when politicians keep fiddling around with education.
政客们不重视教育对孩子非常不利。
1.3
- informal a person who fails frequently or is generally unsuccessful in life〈非正式〉经常失败的人; 人生失意的人：
a ragtag community of rejects and losers.
由被抛弃者和失败者组成的下层社区。
1.4
- Bridge a card that is expected to be part of a losing trick【桥牌】必失一墩的牌。
短语
be on （或on to） a loser
- informal be involved in a course of action that is bound to fail〈非正式〉注定失败。