Easily the most vile shit-talker on this list, Iron Mike talked shit and made you fear for your life. He's told reporters that he'll fuck them until they loved him and that he wants to eat Lennox Lewis's children. What are you going to say to a man that can break your face with one punch? Maybe we should ask Mitch Green that question. Tyson broke his face after Mitch was talking shit to him in front of Dapper Dan's in Harlem.