Bosman
/ˈbɒzmən/noun
usu. as modifier
- used with reference to a European Court ruling which obliges professional football or other sports clubs to allow players over the age of 25 to move freely between clubs once their contracts have expired巴斯门裁定（关于职业足球俱乐部或其他体育俱乐部必须允许25岁以上的运动员在合约期满后自由转会的欧洲法院裁定, 因比利时足球运动员巴斯门上诉后导致此裁定产生, 故名）。
词源
1990s: named after Jean-Marc Bosman, a Belgian footballer who brought a legal case which resulted in the ruling.