a girl who appears pretty from behind but not from the front (origin: Japanese)
That chick in accounting looked totally hot, but turned out to be a bakku-shan, so Monkeyboy can have her.
A woman who appears attractive, but only when seen from behind.
She's got a nice figure but her face looks like shit... She's a bona fide bakkushan!
(n.) A girl that is hot from behind, but not from the front.
She's a total bakku-shan, but that's okay, I'm only going to see her from behind.
(Japanese slang) A girl who appears pretty from behind but not from the front.
Ugh - that back end is the phatness, but the girl's a bakku-shan. If you gotta get it, get it from the back.