The term MOB FILM EXTRA can be summarized as a GOON, which is a four letter word. A GOON is a hired thug or enforcer who works for a crime boss or other criminal organization. Goons are often used to intimidate people, enforce rules, and carry out violent acts. They are also sometimes used as bodyguards or to provide protection. Mob films often feature goons as characters, and extras are often hired to play them.