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. GG Allin is best remembered for his notorious live performances, which often featured transgressive acts, including coprophagia, self-mutilation, and attacking audience members. 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", respectively.

Known more for his notorious stage antics than for his music, he recorded prolifically, not only in the punk rock genre, but also in spoken word, country, and more traditional-style rock. His extremely politically incorrect lyrics, which often covered subjects such as misogyny, pedophilia, blasphemy and racism, polarized listeners and created varied opinions of him within the highly politicized punk community. When questioned about his music and shows, Allin often replied that he was trying to make rock music "dangerous" again.