Put simply, a fat chick who thinks she's hot as hell and therefore is stuck up and arrogant. Usually they can be found in groups of 3 or more which is refered to as a herd, wandering a shopping venue or a party and without a doubt not more than 10 feet from food.
Bob (approaching the herd): Excuse me, do you know what time it is?
Duece Chin Diva: EXCUSE ME!?!? Uh My Gawd, Like really? I'm so over it, like..like let's go to the beach...
Bob: Ya go to the beach Duece Chin Diva and get your chins some sun, fuckin' whale!!