Here is a list of common words spoken in JAV. Next time when you watch JAV, you might know what they're saying.
dame! - 'no!' usually said when the guy says ikitai
dou? - how is it?
iku - 'I'm cumming'
ikitai - 'I want to cum'
icha/ichatta - 'I've cum'
ippai detta - 'lots of cum'
irette? - 'can I put it in?'
iritai - 'I want to put it in'
kimochi yokatta - 'That was great'
kimochi? - 'feel good?'
mitai - 'I want to see'
monde - 'massage them (breasts)'
nametai - 'I want to lick'
(o)chinchin - 'penis'
(o)chinchin tateru - 'penis is erect' also used for nipples
(o)chinchin genki - 'penis is erect/strong'
ookii / sugoku ookii! - 'it's big!'
ookii ni naru - 'it's become big'
oishii - 'delicious' usually said when the gal is giving fellatio, or eating cum
(o)manko misete ageru - 'I'll show you my pussy'
idai - 'great' only heard this a few times
sekusu shitai - 'I wanna have sex'
sekusu shita koto ga nai - 'I'm a virgin'
suwatte - 'sit down'
tatte - 'stand up' (same word using for erect penis/tits)
yamete kudasai - 'please stop' when someone is being raped
yarashii - 'that's dirty/digusting' in a sexual way
zamen oishii - 'delicious cum'
zamen motto hoshii - 'I want more cum' - I hear in those bukkake ones
here's some other terms (a lot you'll find from interviews)
hazugashi : embarrassed
tanoshi : fun/enjoyable
daisuki : like a lot
hoshi : want
motto : again/more
oppai : breast
ippai : all (a lot)
ai-chan: lover/partner
onani- : masturbation
hen : weird/abnormal
atsui : hot (believe this term can also mean something like "deep")
dameoshi : sure/ok (a shy or unshure way of expressing)
daijoubu : i'm ok /alright
yokata : glad/relief
paizuri : titty fish
omanko : intercourse
zenbu : whole thing / entire
shakuhachi : blow job
tekkoki : hand job
Amateur: "Shirouto", or occasionally "amachua"
Anaru: anal
bishoujo: pretty woman
bishonen: pretty boy
CM: Commercial Model
gakuen: school
gokkun: swallowing semen
gurui: maniac
hadaka: nude
han juku: half-ripe (middle age/young)
hora (ora): look
ko-girl: Small girl (Teenagers)
kuchi: mouth
M-girl: Masochist girl
manko: pussy
mejiri: woman's butt
Nakadashi: cream pie (internal cumshot)
OL: Office Lady
pansuto: Stockings/nylons
roshutsu: exposure
Shiofuki: female ejaculation
.....: awesome, incredible, etc.
Y-setsu: Obscene (pronounced: 'waisetsu')
yada: no
zamen: semen
zenra: totally naked
Zamen = Semen
Gansha = Facial
Gakette (pronounced 'Gaket'te") = Please shoot (referring to sperm)
Ipai Zamen Gakette kudasai = Please shoot lots of semen (heard in Bukkake)
Nonde = Please Drink (Basic form is "Nomu")
Unko/Unchi = Poo (shit)
Tabete = Please Eat (Basic form is Taberu)
Gokkun = Swallow (This is an onomatopoeic word, denoting the sound of swalling.)
Nakadashi = Deliver inside (Refers to ejaculating inside the woman's vagina - 'Naka' means in, 'dashi' infers giving, delivering etc!)
Itai = It hurts
Mot'to = More
Ippai = Lots
Sukoshi = A little (normally referring to an amount of something)
Chotto = A bit
Yada/ Yada yo! = Don't / Stop it / Desist
Kimochii = Feels good
Kimochii warui = Feels bad
Yamite (kudasai) = Please don't (Said with "kudasai" is most polite/formal version)
Yamerou = Don't (Aggressive - generally only said by men)
Oishii = Delicious
Dai suki = I really like/ I love
Chin Chin = Penis (This is a playful version, more like 'willy' or 'dick')
(O)manko = Vagina (Literally 'cunt'. "Omanko" is polite/honourific)
Hentai = Pervert(ed) ("Hen" means wierd, and "tai" is used with verbs to express the want to do it)
Sugoy = Wow! (Said in amazement)
Shaboo = Suck
Pero Pero = Lick
O-kii = Big
Momo = Peach (Generally refers to a girl's hips)
Chichi = Tits
(O)kama = Gay (Translates more like "Fag") - no offence meant to anybody, ok!
Well, that's a few to carry on with (and all that I can think of for now) but if you really want a detailed list, follow this link -
http://www.asstr.org/~cobalt_jade/INFO/Japslang.html
