Yaoi Hole
In the 19th century, the term "Yaoi Hole" was used as a derogatory term for a building that housed a gay couple. Through the years, the term has been adopted by the Japanese into their manga/anime "Boy Love" culture, now meaning a boy's vagina.
School girl 1: "Have you seen the new issue of BL Xtreme?"
School girl 2: "Yes, the scene where Hajimi puts his penis into Hideaki's yaoi hole is the hottest!"
School girl 2: "Yes, the scene where Hajimi puts his penis into Hideaki's yaoi hole is the hottest!"