twelfth man
noun [ C ] UK (also 12th man) uk/ˌtwelfθ ˈmæn/ us/ˌtwelfθ ˈmæn/ twelfth men
（板球运动中的）替补队员，预备队员
in a cricket team, a reserve (= extra player)
足球比赛中为球队提供有力支持的球迷（他们的存在仿佛使球队增加了一名球员）
used to refer to the football supporters at a game when they are giving good support to their team and have the same value as an extra player