Sid Vicious was the stage name of John Simon Ritchie, an English musician best known as the bassist for the punk rock band the Sex Pistols. Despite his limited musical ability, his chaotic and nihilistic persona made him a definitive icon of the punk movement. His life was marked by intense controversy, drug addiction, and a tumultuous relationship with his girlfriend, Nancy Spungen. Vicious died of a heroin overdose in 1979 at the age of 21, cementing his legacy as a tragic figure in rock and roll history.