He is the arch-enemy of trouser confidence, Professor Moriarty in groin form, Darth Vader without the helmet.
He kills a man's erection.
First used in the BBC series "Coupling" in the episode, "The Melty Man Cometh."
Jeff: Or he will come.
Steve: And you won't
Patrick: For god's sake, there's no such thing as the melty man!
Jeff and Steve: AHHHHHHHHHHHHHH!