An act of stinginess.
Mary: That guy didn't even tip me!
John: He pulled a Liberman on you, eh?
The jew of all jews, also known as superjew. Collects pennies and is stingy about anything to do with money.
Joe: Look, a penny! Good luck, eh? (bends over to pick it up)
Liberman: Fuck you, it's mine! (Shoves Joe, steals penny and runs away)