Kevin Michael "GG" Allin (born Jesus Christ Allin; August 29, 1956 – June 28, 1993) was an American punk rock musician and songwriter who performed and recorded with many groups during his career. Allin was best known for his controversial live performances, which often featured transgressive acts, including self-mutilation 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'.