A term GwenStephanie uses to relate to the teenagers she hopes will purchase her crappy album.
Gwen Stephanie is hot, but please, stop creating music like Hollowback Girl....isn't that break dance move, not a term describing yelling into a voice modulation machine to crappy beats.
It's an expression meaning to telephone someone. If a guy tells a girl in passing to "holla back", he's looking to get with her. If the girl calls she is a "hollaback girl".
a holla back girl starts off as a booty call. the guy wants to "holla" aka.. he needs some ass and after that particular bootycall, he forgets all about their little "fling" until one day he wants another booty call from that same person. as in.. he wants to "holla back" therefore, you get "holla back girl"
ryan wants to mess around with someone. so he calls susie, and they messaround that night. the next day, ryan completely ignores susie. this goes on for about a week and a half. until one day ryan decides that he wants to mess around with susie again. so he calls her to "holla back" at her. but she refuses. thus proving that she is not a holla back girl.