Made guy: an indoctrinated member of the Family. Essentially, you pledge your allegiance to the boss and the family for life. To even qualify, your mother has to be Italian.
Stand-up guy: someone who refuses to rat out the Family no matter what the pressure, offer, or threat.
Wiseguy: a made guy.
See more Mobspeak: The Language of the Mafia at http://pixelmafia.org/speak.html