Salvatore Giancana (born Salvatore Giangana; June 15, 1908 – June 19, 1975), better known as Sam Giancana, was a Sicilian American mobster and boss of the Chicago Outfit from 1957–1966. Among his other nicknames were, "Momo", "Mooney," "Sam the Cigar," and "Sammy.
Born as Salvatore Giangana to Sicilian immigrants in Little Italy, Chicago. His father, Antonino (later simplified to Antonio) Giangana, owned a pushcart and later briefly owned an Italian ice shop, which was later firebombed by gangland rivals of his son.
Sam Giancana joined the Forty-Two Gang, a juvenile street crew answering to political boss Joseph Esposito. Giancana soon developed a reputation for being an excellent getaway driver, a high earner, and a vicious killer. After Esposito's murder, in which Giancana was allegedly involved, the 42 Gang transformed into a de facto extension of the Chicago Outfit. The Outfit was initially wary of the 42ers at first, thinking them too wild.