A term used to describe a guy who is such a hideously bad fuck, that even if he paid for it, the whore would give him his money back. In extreme cases she would even consider risking bitch slaps from her pimp by actually paying the GUY to stop fucking her. After which, she may even throw him a little extra coin (out of overwhelming pity)so that he can go buy a world of warcraft figurine, comic book, tube socks or a video game.
See also: Two pump chump
That guy over there with the cape, he's so notwhorethy.
Kyle, you are notwhorethy, I can't see you anymore.