giant-killing
adjective [ before noun ] mainly UK uk/ˈdʒaɪ.əntˌkɪl.ɪŋ/ us/ˈdʒaɪ.əntˌkɪl.ɪŋ/
屠杀巨人（用来描述在体育比赛中队伍或选手战胜了比自己强很多的对手）
used to describe a sports player or team that defeats a much stonger opponent, or an occasion when this happens
If Scarborough beat Chelsea, it would be the biggest giant-killing upset of all time. 如果斯卡布罗战胜了切尔西，那就是有史以来最让人震惊的屠杀巨人。