1:A prep that shops at abercrombie and brags about their beautiful abercrombie clothes, but in reality they just spent $60 for their abercrombie t-shirt an their jeans are so tight they can't sit down.
2: When it's used in the plural, it refers to a clique of girls and guys who are abercrombites.

when you're hungover as shit after a spending a night drunk as a skunk

rich princess girl who is obsessed with abercrombie and fitch clothes, which are overprised and ugly.