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1 definition by Brielle Smith

(Originated from the movie, "Mean Girls".) A group of popular,sophisticated girls. Rumors and gossip surround their daily lives. One doesn't become a plastick, it is what they are born to be. Their tight clique can be confused for being snotty people, even though they go by the persona of "hard,cold,shiny plastic!". They're just like the next girl, only a level higher.
Those plastickz are the coolest girls in school.
by Brielle Smith August 21, 2008