Term	Short answer	Long answer
anime	"Japanese animation"	The old word for animation is "manga" (literally "leisure pictures"), but sometime in the 1970's, about the time the magazine Animage was founded by Tokuma Shoten, the term "anime" was coined. It just means "animation" of any kind, and to the Japanese, it covers Disney animation as well. Of course Westerners use the term to describe only Japanese animation.
manga	"Japanese comics"	See above. If you talk to anyone older than 40 in Japanese, they're likely to describe those reruns of Yamato you're watching as "manga." But in English, the term manga just describes all forms of Japanese comics.
doujinshi	"amateur Japanese comics"	Doujinshi (literally "same person books") are a form of underground comic book that Japanese fans. The vast majority of doujinshi are not adult, but the products that J-List carries are almost always adult, since this is one of our specialties. They are very much "tributes" to the popular anime, comic and game characters, even the erotic ones: the fans love the characters so much, they can't help drawing erotic tales, fantasizing about this character having sex with that. They are very collectible, since only a few hundred of each book are printed, and they're nearly always out of print from that moment.
hentai	"adult anime, comics or games"	In Japanese, the word "hentai" is not really a nice word, as it means "sexual pervert." In English, fans started using it as a catchall to describe all adult Japanese anime, games and comics
"H"	anything sexual	"H" is the first letter of the word "hentai." For some reason, the letter "H" has come to refer to any kind of sexual term. If a guy touches a girl, she screams and calls him "H" (ecchi!). If a couple has sex, a term for this act us "H suru" (to do H, i.e. to have sex).
bishoujo	"pretty girl"	Really a term that describes any pretty girl, the word has come to refer to the adult anime simulation games that are so popular in Japan. Bishoujo games are also called "hentai" games (although we don't like this term as much).
AV	"adult video"	Different countries use abbreviations for different things. In Japan for example, a P.A. is a "parking area" or a little place you pull off the freeway to buy food, drinks and gasoline. AV is Japanese parlance for "adult video" (not audio/visual), and an AV girl or AV idol is an adult video star. Now you know.
gaijin	"foreigner"	A word that literally means "outsider," gaijin is kind of a rude word when used in some situations, as it sounds short and might offend some listeners. A more politically correct word is "gai-koku jin" or "outside country person." There is a tendency for gaijin to refer to themselves by this word, but sometimes take offense if Japanese say "Hey, gaijin." In this way, it's not unlike American blacks and their use of the "n" word as a way of forming groups.
bukkake	"facial"	Ejaculating on a woman, principally on her face. "Kakeru" means "to pour onto" in Japanese. Like many words in the "adult" world in Japan, it's a normal word -- one of the most famous noodle dishes is Bukkake Udon, with a white sauce poured over noodles. Um, yeah.
yaoi	male/male homosexual comic	A huge up-and-coming form of comic/anime, yaoi is an often sexual art style that is generally popular among girls. It often features sexual drama and artwork between males, especially some male characters in anime.
shounen-ai	"boy love"	A sub-set of yaoi, it refers specifically to sexual comic (and doujinshi) about the love between guys. Also called BL. Also written shonen-ai.
bishounen	"beautiful boy"	Just what it says. Also written bishonen.
shoujo	"girl"	Meaning simply "girl," this word has come to describe any kind of anime or manga comic for girls. Weekly manga magazines like Ribbon are "shojo comics." Often, shoujo themes are cross-bred with other themes. Also written shojo, although strictly speaking the word with the short vowl means "virgin," not "girl."
kawaii	"cute"	This term means "cute." Usually said "Kawaii!!!!!" in a very high pitched voice by cute anime girls.
cosplay	"costume play"	Basically, dressing up in your favorite costumes, usually as characters from anime. As a category of adult product, seeing a pretty girl dressed up as Chun Li while getting banged by Ryu.
kogal	Japanese version of "valley girls"	Really difficult to describe. Ko = "child" and Gal = "gal." Also called just "gals" kogals are a kind of Japanese girl who wear outrageous styles, paint their faces with weird make-up, and tan their bodies in tanning salons. There have been many shifts in kogal culture since they emerged around 1995, growing out of the old Amuler boom (when all the girls wanted to dress up like Amuro Namie. Various types have included including younger versions of kogals (mago-gals, where "mago" means "grandchild"), yamanba ("mountain hags," girls who tan themselves til they're black), and one-gal ("oh-nee gal," gals who act grown up, like stylish actress/model Noriko Fujiwara). Kogals are sexually very loose, which is exciting to see, thus Japan's pornography industry has latched onto that with magazines, videos and more. Since girls who have sex can get pregnant, there are also "mama-gals" in Japan now, silly young women in their early 20's who wear outrageous fashions yet push baby carriages.
loose socks	big, bulky socks	These big, loose socks (if you're talking to a Japanese person, you need to pronounce them as "lose socks") are the trademark of kogals. Virtually no high school girl goes around without loose socks on. To keep them stuck to your leg, apply "socks glue." We happen to sell both loose socks and socks glue at J-List.
omanko	pussy	The only "really" bad word in Japanese, omanko (or just "manko" -- the "o" on the front of words in Japanese is a polite prefix that could be translated as "honorable" if you wanted the translation to sound stupid) just means pussy. Don't say it to Japanese people, it's very rude.
gokkun	"gulp"	This is the sound of swallowing to the Japanese. Thus, as a pornographic term, it implies a woman sucking off a guy and swallowing.
oppai	"tits"	Breasts, tits, teats.
oshiri	"ass"	A girl's rear end
paizuri	"titty fucking"	The Japanese word for a man coplating with a woman's breasts. "Pai" comes from "oppai" (a normal word for breasts). Zuri means "stroke"
tekoki	"hand job"	Another fetish to come up in recent years, tekoki is the act of a female giving a male a hang job. There are quite a few tekoki-only products on J-List's pages.
meganekko	"glasses girl"	A word that means a girl (ko) wearing glasses (megane)
pai-zuri	"titty fucking"	The fetish of humping boobs. From pai (breasts) and suri (to stroke).
otaku	fan (of anime, manga, anything)	A word which really means "you" or "your family," this is a term that has come to mean anyone who gets carried away in his love of anime, manga, sci-fi films, JPOP idols, or any other topic. There are all kinds of otakus in the world, perfume otaku, goth otakus, shoe otakus. It's fun to get obsessive over pop culture! Note that fans of anime use the term all over the world, but in Japan it's not really a positive concept. Just as you wouldn't always feel right about a "Trekkie" who wore Spock ears while shopping, celebration of one's self as an otaku is better done quietly and with others who share your passion. If you have anime T-shirts and want to wear them in Japan, you might want to reconsider ^_^
NSFW	"not safe for work"	A euphemism for anything that's adult in nature and should be avoided while at work. Since emails will often be trapped as spam if they contain certain keywords, we usually use this term instead of, say, "adult," in our emails.
zenra	"all nude"	There's a big boom in "all nude" sports in Japan, mostly headed by Soft on Demand, who had brought out many innovative videos over the years.