Moonraker is called a "dark horse"; that is neither his sire nor dam is known. ["Pierce Egan's Book of Sports," London, 1832]
来自赛马行话,即暗中的突然出现的马。因而常常用以比喻:出人意外获胜的参赛者。
该词的英语词源请访问趣词词源英文版:dark horse 词源,dark horse 含义。
源于赛马场的俚语,指外表并不起眼,赛马时出人意料地夺魁的马匹,并非指马的毛色。1861年当时既无名气又无资历的阿伯拉罕·林肯当选为美国16任总统,因而曾被人们称为黑马式的总统。比喻实力或价值难以预测的人、物。