Kevin Michael "GG" Allin was an American singer, songwriter and record producer, who performed and recorded with many groups during his career. GG Allin was best known for his outlandish live performances, which often featured transgressive acts, including coprophagia, self-mutilation, and attacking audience members, for which he was arrested and imprisoned on multiple occasions. AllMusic and G4TV's That's Tough have called him "the most violent man in rock n roll" and the "toughest rock star in the world", respectively.