mafia Look up mafia at Dictionary.com
1875, from It. Mafia "Sicilian secret society of criminals" (the prevailing sense outside Sicily), earlier, "spirit of hostility to the law and its ministers," from It. (Sicilian) mafia "boldness, bravado," probably from Arabic mahjas "aggressive, boasting, bragging." Or perhaps from O.Fr. mafler "to gluttonize, devour."