Wingfic

Section three, on forms and genres, might consider such fan genres as slash, het/ship, genfic, alternate universes and realities, mpreg, BDSM, kinkfic, elves, and wingfic.

Also in 2001, the bizarre but popular subgenre of wingfic appeared within the NSYNC fandom—these stories, characterized by someone growing at least one wing, spread to other slash fandoms before dying away in 2003.

For example, it is hard to imagine how much narrower a genre could possibly become than “wingfic,” a story about a character sprouting wings.