It’s a subculture of people who have ’‘fursonaes’’. Basically, they dress up like various animals, attend furry conventions, or read/draw/write comics/books/whatever else that depicts anthropomorphic animals. Nothing wrong with it, I just think it’s fucked up. Some of these people go over the top, bringing their fantasy into real life too much. There’s also scalies, but it belongs to the same subculture. It’s just lizards and the like, rather than mammals.
As I’ve pointed out, the sexual side of this freaks me out. Don’t look it up.