1. Used to describe something that will be thoroughly completed.
2. When a task not just done, but more than done.
3. Consider it done.
It's done and donner!
Term is used in the 1998 movie Safe Men, when Big Fat Bernie Gayle (Michael Lerner), boss of the Providence Jewish Mafia, asks his "intern" Veal Chop (Paul Giamatti) to take care of his two inept safe crackers (Sam Rockwell and Steve Zahn).