BP

Boypussy or BP for short. Commonly used in shounen ai and gay hentai and shit. It's just the butthole, but that word doesn't turn you on and make you feel less gay, so we use boypussy. Characters who refer to there anal as boypussies are femboys and traps. Examples are Astolfo, Felix, Saika, and a bunch more, which I'd all fuck, no homo tho.

"Fuck my BP(Boypussy)", said Saika after I finished lubricating him with a counterclockwise rimjob.