Big Booty Bob

Big Booty Bob is someone who has a big booty and is not a ho(e). Hence the bob. They have morals and don't bother with 'going around'.

Person1: Do you see that girl over there?
Person2: Which one? The one with the big booty?
Person1: Yeah that's Big Booty Bob.
Person2: Why Big Booty Bob?
Person1:because she has her life together and doesn't go around.