Weez said: "Well, I get that they all have names, and that helps the whole thing comes to life, but the question was what do some of the names mean? I mean, Baby John is self-explanatory; he's a little wee guy and his name is John. One presumes Ice is renowned for his coolness. But where might the name Anybody's have come from? (Should it even have that apostrophe?)
What comes to mind for me with Anybody's being so named - and this may or may not have been what was actually intended - is the idea of the fraternity "little sister" - who, from what I've been told (not from experience, so correct me if I'm wrong), often has sex with anyone in the fraternity. So, it might refer to that she'll be "Anybody's" to have in that way.
Or it could be a question - Anybody's? - or in other words "does she belong to anybody? Is she anybody's little sister? Why is she hanging around here?" Which now that I think about it, actually seems more likely, given her tomboyishness and the machismo of the jets.
Or - she'll be anybody's friend - anybody who'll put up with her.