A pervony is a sub-category of the fan base referred to as bronies. A brony is an adolescent or adult male who is a fan of the show "My Little Ponies." Pervonies are men who comprise a small offshoot of the fan group bronies, and are generally considered perverted and/or deranged. They consist of fan fiction writers and fan artists whose work is filled with sexually explicit and/or macabre subject matter loosely based on the "My Little Ponies" cartoon. This group also includes consumers of such material. The "My Little Pony" material created by pervonies includes porn comics, food fetish fan fiction, a post-apocalyptic My Little Pony epic which has "graphic rape and sex scenes and numerous gory deaths," and "a Stygian epic about the Rainbow Factory wherein ponies are murdered to extract the necessary pigment for rainbow production." Thus the name is derived from a mix of pervert + pony.
"Hey dude! I heard you're a brony! That's awesome. I am too."
"Sweet. We should hang out sometime. But just to be clear, you're not a pervony are you? I like My Little Ponies, but I don't get off on kid's cartoons. I just enjoy the show."