The term 'Pugilist Spinks' refers to Leon Spinks, a former professional boxer who won the world heavyweight championship in 1978. He is best known for his upset victory over Muhammad Ali, which made him the first boxer since Rocky Marciano to win the heavyweight title in his first professional fight. Spinks was also the first Olympic gold medalist to win the heavyweight title. He retired from boxing in 1995 with a record of 26 wins, 17 losses, and 3 draws.