A Sicilian gangster is also known as a MAFIOSO. The term MAFIOSO is derived from the Sicilian Mafia, which is an organized crime syndicate that originated in Sicily, Italy. Mafiosi are typically involved in activities such as extortion, racketeering, and money laundering. They are also known for their code of silence, or omertà, which is a strict code of honor that forbids members from revealing any information about the organization.