a girl that you love a LOT. whether it be romantic or family love. a name for a girlfriend you feel very very much for, or name of a young sister, cousin, niece, daughter, grandaughter...you get the point. basically a very intence loving word for a girl.
-i love you girlbaby.
-come on girlbaby let's go home.
-awe, yeah, that's my girlbaby.