Kevin Michael "GG" Allin was an American punk rock musician who performed and recorded with many groups during his career. His live performances often featured transgressive acts, including self-mutilation, defecating on stage, and assaulting audience members, for which he was arrested and imprisoned on multiple occasions. AllMusic called him "the most spectacular degenerate in rock n' roll history", while G4TV's That's Tough labelled him the "toughest rock star in the world".