A man or woman who sees you working the room, getting your flirt on, and remains in the background until the precise moment when BAM!-you have used up all your slutty powers and are drained and then they move in and take it to the next level-out slutting you.
Mike: "Hey Joe, what's your sister's name?"
Joe: Her name is Jessica!
Mike: Last night while I was doing her in the butthole I referred to her as a 'ranga slutter.'