A nickname for the side of someone, usually mean and/or cruel, that isn't normally seen. Usually played off as a joke, but sometimes can lead to major arguments between friends. Best if new friends are warned before-hand of this side.
(Some actions are not remembered once the Evil Quinton side has returned the brain to it's regular state.)
Jack-Can I sit here?
Jim-Ew, no get away!
Jack-Well fine, I see how it is!
James-Don't worry Jack, it's just his Evil Quinton coming out. He won't even remember this.