The term 'Goodfellas' is a reference to the 1990 Martin Scorsese film of the same name. The movie follows the lives of three gangsters, Henry Hill, Jimmy Conway, and Tommy DeVito, as they rise through the ranks of the Italian-American MOB in New York City. The crossword solution for the term 'Goodfellas' is 'MOB', which is an acronym for 'Mafia Organized Crime'. This term is used to refer to the criminal activities of organized crime syndicates, such as the Italian-American MOB depicted in the movie.