US someone or something, especially a sports team, that achieves success when people think they are

中文解释

（尤指体育队）未被看好却取得了成功的人（或事物） The Colts, with their \"poor\" defense, may prove to be the Cinderella team of the playoffs. 防守“表现不佳”的小马队可能会成为季后赛的灰姑娘。