Kevin Michael "GG" Allin (born Jesus Christ Allin; August 29, 1956 – June 28, 1993) was an American punk rock singer-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, onstage defecation and coprophagia, indecent exposure and assaulting audience members, for which he was arrested and imprisoned on multiple occasions. AllMusic and G4TV's That's Tough have called him "the most spectacular degenerate in rock & roll history" and the "toughest rock star in the world”.