An over-enthusiastic, dumb, naieve, annoying, loud, squealy, MTV generation teenage chick that will do anything stupid to be the center of attention. Everyone's brother, cousin, boyfriend, best friend has dated or slept with one- and regretted it.
-That bippytwat is gonna get it if she doesn't get her hands off my boyfriend.
That dumbass bipppytwat girlfriend of yours has got your ass WHIPPED!
Generic name for a person of ambiguous sex. Herm- short for hermaphrodite. Herman- male name. Amanda- female name. Her-man-duh - Her? man? Duh.
Check out Hermanda over there... either she needs a mustache wax or he needs to lose the man tits.