Baby Girl

The online urban dictionary states that the term baby girl is an endearment.
~ Something a boy calls his girl when he is in love.
A girl in love will also use the term and say, baby boy.
~ A sexy slang word for what a guy calls his girlfriend.
~When a boy is attracted to a girl, usually because of body.
This slang snuck up on me. I have no memory of how its use began. I feel the same way about the term, fadda, mudda and eat ah food.
Baby girl seems to have extended from the days when men on the block would call you 'family' as you passed by.
I also assume that it may have been adopted from Jamaican slang through their music.