1 definition by Tally Y.

Someone who dresses, acts, talks, etc. a certain way to 'fit in'; unoriginal; conformist.
Justin is so annoying. Last year he was always fully decked out in Abercrombie, but now he's started wearing skinny pants, raves about going to local gigs, suddenly loves underoath, and he just went and dyed his hair black. What a poser.
by Tally Y. January 10, 2008
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