He's an NFL player, who's got a reputation for being a showman. Some of his more famous touchdown celebrations have included proposing to a cheerleader, throwing on a golden jacket saying "future hall of famer", doing the riverdance and also changing his name from Chad Johnson to the almost spanish of his jersey number (85) and even racing against a horse.
He's one of the real characters of the sport and a good laugh to follow on twitter too.
A certain video website has some of his moments.