Whopp, or Whepp, is a word formed from the combination of the words whore and prep. A whopp is the sort of girl who will constantly go to footballers' parties to get drunk and have sex.
Also known as Po's.
Typical JCA person: Hey girl, what happened to your arm?
Typical JCA Whopp: I went to my boyfriend's party and it was my first time drinking and I was allergic to beer and I passed out and they called the ambulance but the cops came and we all got busted and my boyfriend broke my arm because he was pissed.