A word used to define posers, or wanna be's. For example, someone who thinks anti-prep means not being confined to one corporate clothing line. (WTF????) Someone who does not realize that they are actually a prep. Believed to have been originated in the song "Perp Itna", by Straight Edge.
Girl 1: I love The Misfits!!
Girl 2: Do you know any of their songs?
Girl 1: uh....
Girl 2: What a perp itna