1. (尤指名声不佳或不受欢迎的团体或组织的)代言人，头面人物，名誉代表
If you say that someone is a front man for a group or organization, you mean that their role is to represent and give a good impression of it to the public, especially when it is not very respectable or popular.
1. a person used as a cover for some questionable activity