The phrase "ruthless gangster" refers to a person involved in organized crime who shows no mercy or compassion, often resorting to violent and cruel behavior to achieve their goals. Full definition
With his portrayal of ruthless gangster Jimmy «Whitey» Bulger in director Scott Cooper's «Black Mass», Depp is generating the most positive buzz since he played Sweeney Todd on screen back in 2007. (lights-camera-jackson.com)
His character manages to go seriously in debt to the Koreans who run the underground gambling establishments, as well as ruthless gangster Michael Kenneth Williams («Boardwalk Empire»), and a philosophical mobster (a bald John Goodman) doing his best Jabba the Hut impersonation. (moviereviewsfromthedark.com)
In recent years audiences have been invited to love ruthless gangsters, drug dealers and even serial killers. (canadianbusiness.com)