Compound word from Residue and Douchebag. Pronounced, (reh-seh-doo-shh).
Definition: The leftover douchebags, from the previous herd of douchebags, who remain in a bar or club to try to find a drunken straggler to manipulate and/or molest after said bar or club has turned on the lights and most people and self-respecting Douchebags have left the establishment.
"Girl, PLEASE hurry up and finish that drink!! We gotta get out of here before we get spotted by a RESIDOUCHE!!