[1970s+] (US Und.) the status of being in a US Mafia ‘family’; usu. as earn/get one’s button v., to be made a member of the Mafia.
[1960s+] (US) a lower echelon member of a Mafia family.
[1970s] (US Und.) a criminal who is on the fringe of full membership of the US Mafia; also attrib.