Lammest: one who has gone out on a lam. to escape or hide from other gangsters or police.
Legbreaker: a hoodlum who beats people for his superior.
Made guy: someone who has been indoctrinated to membership in Cosa Nostra.
Make: to be indoctrinated to membership in the Cosa Nostra.
Man of respect: a ranking, senior member of a crime family.
Mechanics: card and dice manipulators who rig games.
The meets: a conference of criminals.
The mob: a crime family; the entire Cosa Nostra; often loosely interpreted to mean a confederation of criminal organizations with members of varying ethnic backgrounds.
Mustache Pete: an elder statesman and former member of the original Mafia; in the early 1900s, they were famed for thier long mustaches.