Note: Some of these terms are 13+.
I won't put my personal opinions on any of this here, it's just definitions. I do not agree or disagree with any of these terms inherently.
Otaku: Anime nerd.
Weeaboo: Anime fan.
Weeb: Shortened version of weeaboo.
Waifu: Female anime crush.
Husbando: Male anime crush.
Shounen: Manga or anime directed at younger boys.
Shoujo: Manga or anime directed at younger girls.
Seinen: Manga or anime directed at older men.
Bishounen: Pretty boy. A boy in anime that is considered beautiful. Also shortened to "bishi"
Bishoujo: Pretty girl. A girl in anime that is considered beautiful. Also shortened to "bisho"
Shounen-ai: MLM anime with light MLM stuff. Usually stops at kissing,
Shoujo-ai: WLW anime with light WLW stuff. Usually stops at kissing.
Loli: An over 18 year old girl in anime that is considered to be childlike. Not a necessarily sexual term, but it is often used that way.
Lolicon: An enjoyer of "lolis".
Shota: An over 18 year old boy in anime that is considered to be childlike. Not a necessarily sexual term, but it is often used that way.
Shotacon: An enjoyer of "shotas"
Kodo: An over 18 year old gender neutral person in anime that is considered to be childlike. Not a necessarily sexual term, but it is often used that way.
Harem: A romance-based trope in which a character is surrounded by many female characters that are interested in them. Derived from the Arabic word "hareem" meaning "lots of women".
Reverse Harem: A romance-based trope in which a female is surrounded by many characters that are interested in them.
Hentai: Anime porn. Derived from the Japanese word for "pervert"
Yuri: Girl on girl hentai. Derived from the Japanese word for "lily"
Yaoi: Boy on boy hentai. Derived from homophobic Japanese slang. Many MLM people have asked fans to use different terms instead.
Bara: A non-queerphobic version of the term "yaoi". Derived from the Japanese word for "rose".
Fujoshi: A woman who is interested in MLM, Achillean, or gay anime. Translates to "rotten girl". Only women are allowed to use this term, due to it's queerphobic and derogatory origins.
Fujin: A person who is interested in MLM, Achillean, or gay anime. Fujoshi without the gendered suffix "joshi".
Fudanshi: A man who is interested in MLM, Achillean, or gay anime.
Himedanshi: A man who is interested in WLW, Sapphic, or lesbian anime. Translates to "princess boy". Only men are allowed to use this term, due to it's queerphobic and derogatory origins.
Himejin: A man who is interested in WLW, Sapphic, or lesbian anime. Himedanshi without the gendered suffix "danshi".
Himejoshi: A woman who is interested in WLW, Sapphic, or lesbian anime.
Aheago: A combination of a moan and the Japanese word for "face". A face that a character in a hentai makes while orgasming.
Eroge: Hentai video games.
Oppai: Anime boobs.
Pettanko: Used to describe an anime girl who is flat, or has a small chest.
Meganekko: An anime girl with glasses.
Futanari: An anime girl with a dick.
Futa: Short for futanari.
Ecchi: Containing sexual themes without being sexually explicit.
Baka: Japanese word for "stupid". Associated with the tsundere trope.
Chibi: Japanese word for "mini". An anime artstyle with cartoony and undefined features. Usually very cute.
Doujinshi: Fan created and self published work in the form of magazine or manga, basically comic fanfiction. Usually erotic.
Doujin: Any fan created work in any form. May or may not be self published.
Gakuran: The high-middle school uniform for male students in Japan. Usually black.
Itai: An exclamation of pain.
J-pop: Japanese pop music.
Kawaii: Japanese word for "cute".
Kowai: Japanese word for "scary".
Manga: Japanese comic.
Nani: Japanese word for what
Urusai: A derogatory Japanese term roughly translating to "Shut up".
Sukeban: Delinquent girl. Could also refer to an entire girl gang.
Bancho: Delinquent boy/gender neutral person. Could also refer to an entire gang.
