Bukkake Sex practice in which men ejaculate on someone. May be seen in some porn or hentai anime. Bukkake may also refer to a type of Udon noodles (see food page). See Wikipedia or Everything2.
Burusera Shops where schoolgirls' used panties are sold to men. See also serafuku (clothes page). See Wikipedia.
Ecchi See anime page.
Furi Kuri Slang for squeezing and twisting, or more specifically, for fondling a woman's breasts. (At least that's what I've read about the title of the anime "Furi Kuri," aka "Fooly Cooly," or "FLCL." But I'm not entirely sure if it's true or not.)
Hentai See anime page.
Iku I'm coming! (Said when achieving orgasm.)
Rorikon or lolicon, Lolita complex. Can refer to pedophilia (interest in underage girls, as opposed to shotakon) or to anime or manga with a lolicon theme. See also Lolita (clothes page, under fashion trends). See Wikipedia or Everything2.
Saabisu See anime page.
Sefure Sex friend. Friend with whom you have sex without a romantic involvement.
Seiteki Sexual.
Shokushu or shokku-shu kei Tentacle porn (or tentacle rape). Porn or hentai in which... oh hell, you know.... See Wikipedia or Everything2.
Shotakon or shotacon, can refer to pedophilia (interest in underage boys, as opposed to rorikon) or to anime or manga with a shotacon theme. See Wikipedia or Everything2.
Shoujo ai See anime page.
Shounen ai See anime page
Tareme See general terms page.
Yaoi See anime page.
Yuri See anime page.
See also: Wikipedia: List of Japanese sex terms and Hentai dictionary