Lemon
In fanfictions, a story that is of an erotic parody nature. The name came from the anime series "Cream Lemon," which was an erotic parody OAV-movie series that is credited with being one of the first hentai titles. In the Bubble Gum Crisis newsgroups they were also known, IIRC, as "DYO" stories from "Damn you, Overstreet!" a reference to a writer of a particularly nasty hentai story concerning the Knight Sabers.