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A person who just because made friends with someone who say they are "straight edge" Has now just suddenly turn/became straight edge. When he/she drinks,has sex all the time,does drugs,or cuts themself. And if their friend stops being straight edge they will too.
strait edge poser:" This guy really likes me because he knows that I'm straight edge"

non straight edge person: "What do you mean, you have cuts all over your body and you got totally wasted last night."

straight edge poser: "Shut up! *takes ecstacy pills*
by lolitakisses September 24, 2006
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