Hentai Ecchi Japanese to English Dictionary

futanari
n. slang
    futanari, hermaphrodite, androgynous / gynoandroid, inter-sex
    「ふたなり / フタナリ / 二形 / 二成 / 双成」
futanaric
adj.
    of futanari, futanari’s
    「ふたなりの / フタナリの」
futanarize
vt., der.
    to change original (or some copyrighted) character to futanari. e.g. futanarise
    「フタナリ化する」1)
futanarizer
n., der.
    A person who tries to make Futanari known all over the world by futanarizing. e.g. futanariser
    「フタナリ化する事に拠って, フタナリを世に弘めんとする者」2)
futanarism
n., der.
    enthusiasm for futanari, futanari-enthusiasm 「フタナリ至上主義」
    [History of art] futanari sect 「[美術史] フタナリ派」
futanarist
n., der.
    enthusiast for futanari, futanari-freak/mania/phile 「フタナリ至上主義者」
    [History of art] artist of futanari sect 「[美術史] フタナリ派の人」
futanarization
n., der.
    A picture or CG with futanarized character.
    「フタナリ化した絵、ＣＧなど」3)

Hentai Slang

アナル
    Anal
    Mainly anal sex, but also includes other kinds of anal insertion.
獣姦
    Beastiality juukan
    Sex with animals.
奇怪
    Bizarre kikai
    Abnormal themes such as body modification, etc.
縛り
    Bondage (SM) shibari
BE
    Breast Expansion
ぶっかけ
    Bukkake

    The sexual act of ejaculating on to one’s partner’s face. Wiktionary
    a group sex practice wherein a series of men take turns ejaculating on a woman. Wikipedia
    Extreme seminal facials.
女装
    Cross-Dressing josou
    Males dressing in female clothing, and vise-versa.
浣腸
    Enema kanchou
    Using a foreign substance to induce defacation.
デブ
    Fat (Girls) debu
輪姦
    Gang Bang rinkan
    Sexual intercourse involving several people who select and change partners in an indiscriminate manner.
巨乳/爆乳
    Giant Breasts kyonyuu/bakunyuu4)
グロ
    Guro
    Slang purely japanese in nature referring to violence to the extremes. (See Ero-guro)
変身
    Henshin henshin
    Gender transformation.
貧乳
    Hinnyuu hinnyuu
    Small Breasts, Girls lacking in the chest department - not Loli.
近親相姦
    Incest kinshinsoukan
    All other incestual relationships.

    Incest (Brother Complex) 「ブラザコン」
    Incest (Father Complex) 「ファザコン」
    Incest (Mother Complex) 「マザコン」
    Incest (Sister Complex) 「シスコン」
獣人 (ケモノ, けもの)
    Kemono
    Humanoid beast
母乳
    Lactation bonyuu
レスビアン, レズ
    Lesbianism
ロリ
    Lolita rori

    Lolita complex, interest in young females.
    A seductive adolescent girl.
水着
    Mizugi
    Girls in school swimwear.
筋肉
    Muscular Girls kinniku
    Female Bodybuilder type muscle mass.
猟奇
    Mutilation ryouki
    Rendering of one or multiple limbs from a body. Directly related to guro.
猫耳, ネコミミ
    Nekomimi
    Catgirls
非エロ
    Non-Erotic hiiro
ニューハーフ
    New-half

    A person with the external genitalia and secondary sexual characteristics of one sex, but whose personal identification and psychosocial configuration is that of the opposite sex.
    A person who has undergone a sex change. e.g. a pre- or non-operative transsexual female. (see also Shemales below)
妊婦, 妊娠
    Pregnant ninpu
放尿
    Piss hounyou
強姦
    Rape goukan
    To force (another person) to submit to sex acts, especially sexual intercourse.
糞尿, スカトロ
    Scatology funnyou
    Fictional play with feces.
シーメール
    Shemale
    A genetic male who has both male and female characteristics; a male who has undergone surgical feminization.
ショタ
    Shota
    Male based lolita complex.
触手
    Tentacles shokushu
やおい
    Yaoi
    Male/Male sex.
百合
    Yuri
    Girl/Girl sex.

More obscure slang

アブノーマル
    Abnormal (see Bizarre above)
巨ちん
    Big Cock ookichin
巨玉
    Big Balls ookitama
肉体改造, 改造
    Body Remodeling nikutaikaizou, kaizou
産卵, 大量産卵
    Egg Laying sanran
拡張
    Expansion kakuchou
    Falls under expansion, enlargement
陰核肥大
    Hypertrophia Clitoris inkakuhidai
    Swollen or Enlarged clitoris/penis
マクロファリー
    Macro Furry makuro fuarii
    “A Macro Furry is simply a giant furry.” (generally larger than 50m)
めがね
    Megane
    Very specific genre of Japan, in where sexual attraction is at a peak with a woman wearing glasses.
ニップルファック, ニプルファック
    Nipple sex penetration nitsupuruhuatsuku or nipuruhuatsuku
    Sexual acts performed with penetration into the nipple(s).5)
おもらし
    Omorashi
    Japanese word meaning “to wet oneself”. A paraphilia involving urinating on oneself but also arousal brought on by having a full bladder, by causing someone to develop a full bladder, or by witnessing someone with a full bladder “relieve” themselves. - Urban Dictionary
ぽっちゃり
    Pocchari
    Depending on who you ask, Pocchari can define: chubby girls, fat girls, beautifully large women, thick women, etc.
精液
    Semen seieki

Media formats

ゲーム
    Game.
    Used in combination with the suffix エロ- to make Eroge 「エロゲ, エロゲーム」 (Erotic Game).
CG集
    CG Collection.
同人誌
    Doujinshi
    Fan Comic/Magazine
成年コミック
    Adult Comic
同人ソフト
    Doujin Soft(ware)
ゲームキャラ
    Game Chara
アニメキャラ
    Anime Chara
オリジナル
    Original Characters / Work
無修正
    Uncensored