JAPANESE BADWORDS!!!

Baishunfu - That girl's a slut!
Busu - Ugly (from the word for pig) Just about the WORST thing you can call a girl.
Chichi - Tits
Chikan - Molester
Chikuso - Damn, Shit, Fuck. Kinda like if you said, "DAMN! I dropped a dollar down that storm drain on accident!" (silent i and u)
Chinchin - Peepee (like a baby word for penis)
Fera - Blowjob
Gaki! - Brat!
Haibokusha - You Loser!
Henshu - Freak!
Hentai! - Pervert/Freak!
Hirogeru onna - Slut (literally, thigh spreading woman)
Iku! - I'm cumming!
Ketsu - Ass (as in rearend)
Kimochi warui - Nasty!
Kimou - [Make it sound like kimooooooh--Osaka dialect] Nasty!
Kintama - balls
Kuso - Shit (the u is silent)
Kusottare - Fuck You!
Manuki - Dumbass
Misuborashi - Sleeze!
Mitame Hen! - You look stupid.
Mokatsuku - I'm Really Pissed Off
Okama - Fag
Omanko - Pussy
Oshikko - Piss
Rezu - Lesbian
Senzuri - Masturbation
Sukebe - Dirty [as in perverted, not messy P:]
Usunoro - Pimp

Time for some REALLY naughty phrases. ^^; You have been warned, these ARE offensive.

Jigoku e ochiro! - Go to hell!
Teno hayai otoko no ko! - You are a (male) whore/player/playboy! [guys ONLY]
Hayaku mite! Aitsu yokochin moreteru! - Hey look! His cock's hanging out!
Atashi dankon wa shaburanai! - I don't suck dick!
Atashi fera daisuki - I love to suck cock.
Hamete chodai! - Fuck me!
Ketsu no ana de yatta koto aru? - Ever fuck someone up the ass?
Ore daitai ichinichi ni ikkai senzuri yaru - I usually jerk off one a day.