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Someone whos acts like someone theyre not,but not realizing that there being fake, basically a loser trying to fit in.
A poser green day fan,this applies to other poser bands--
Todd:have you heard american idiot?Thats the bestest song ever!
Bill:Have u even heard any other green day songs?
Todd:what other green day songs?
by hi June 17, 2005
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A poser is a generally slanderous insult with no truthful backing. It is often used among teenagers depending on what someone wears.

However, the literal definition is someone who attempts to 'pose' or not be their actual self, to fit in among others.
"Dude, John came in wearing an Adio jacket and skater shoes today."
"Are you serious? He doesn't even skate. Man, what a poser."

Truthfully, this by no means suggests that John was actually attempting to pose as a skater. He just bought the clothes he wanted.
by A.A.Z. September 25, 2006
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everybody according to someone. in reality a poser is someone who pretends to be someone they are not. only acting a certain way because they want to be accepted. the problem is someone is going to call you a poser no matter what. the term has lost all meaning really. i once heard a jackass call marilyn manson a poser. really? who is he trying to be if not simply himself? so in short everybody is a poser apparently.
bob: have you listened to the new gwar album?

jack: you like gwar? you're such a poser.

bob: you're a fucking idiot. why do we even hang out?
by JONNYNEKRO May 14, 2011
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One who attempts to appear to others as something they are not, especially by their manner of dress; a charlatan.

also 'poseur'
Take off that gold chain Julio, you're such a fucking poser!
by Tracey December 28, 2003
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Any one who does not follow his/her own ideas of what he/she likes. Following no one set norm makes you real and following no one set norm makes you poser. Poser is governed not by the clothes, music, or makeup you wear, but rather by the state of your mind and the conformity to your own beliefs.
Posers conform to the beliefs of others.
by Alive June 23, 2003
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Virtually every kid in my school. They're almost all middle class, suburban white kids, who wear there pants to their ankles, and say they're "gangsta". 1, maybe 2 kids have any ties to gang activity. You ain't a gangsta, so pull your pants up!
poser gangsta: Wassup White boy?

Me:You're just as caucasian as me

him: ...
by A regular kid November 29, 2006
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A word popularized by the teenagers of this generation. It is used to describe someone who is "biting off" another person, and one who tries to fit in with a group. Honestly, no one even gives a shit about who are "posers" and who aren't. In today's logic, any newcomer is a poser, or anyone who decides to wear something else or listen to something else is a poser. The word is used to bash those who try new things regardless of reason for doing so, and it's one of the most overused words by teenagers. It is mostly used by people who have no self-esteem and resort to talking down to other people or friends to satisfy themselves. Seriously people, fuck off already.
Guy #1: Dude, stop wearing LRG, you're such a fucking poser!
Guy #2: Whateva, I do what I want!
by Anonymous Dude February 25, 2008
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