poser prep
Somone who tries to wear Abercrombie and Hollister to "be cool", or overuses 'like' to sound cool. They also tend to act all popular when they have two or three friends.
Taylor is the definiton of a poser prep. She tried to talk like a valley girl, and strutted down the hall way like she was really popular. She follows the popular girls around, and no matter what they say to her she won't leave them alone.