A more polite way of saying "slut"; remember that a whore gets paid while a slut does the same work for free.
From SNL parody of Girls:
Jessa: I had sex with a cab driver, alright? It's called being free.
Blerta: You are prostitute?
Jessa: No, it's not prostitution if you don't get paid.
Blerta: You are UNPAID prostitute?!? You are lower than dog!
A young girl (around ages 12-13) who is dressing and behaving in such a way that is reminiscent of a prostitute...or her favorite celebutant (e.g. Paris Hilton).
A re-pubescent female who is scantily clad, hanging out in a public area (e.g. the Mall or movie theater) and behaving like a "stupid spoiled whore."
I hate going to the Neshaminy Mall movie theater! It's always way too crowded and always crawling with prostetots! Last time I went some prostetot totally yelled at my boyfriend...she was like 13!