Posers are people who "pose" as something they're not, pretend to look like a group of people, like punks, headbangers or stoners, usually related to music.
That was the simple way, now here's the real definition, according to me: Posers are usually people that don't fit in, so trying to fit in, they act like the people around them, pretending to like the music, have the attitude, and also dressing like them. I will use as an example the tipical poser stoner.
A lot of people don't like stoners, is it because they smoke weed, act like that or because they think that stoners are hippies or something like that, but i think stoners are cool people to be around, i would actually call myself one. But the poser stoner don't really think like his friends, so here are some of the things a poser stoner usually do:

smoke weed as a drug, not as a way to think about life and have fun
Struggle through Dark Side of The Moon and call himself a Pink Floyd fan, and when someone is talking about pink floyd, all he has to say is "they're great! i love their attitude! DSOTM is a great album!"
Can't chill and listen to a Jimi Hendrix song, he has to headbang or air guitar his way through the song
Fills his Ipod with Led Zeppelin, Pink Floyd, Jimi Hendrix songs, even though he hasn't listened to any of those since he was in his friend's.
Thinks surfing is a way to show off to his/her friends
If offered some drug as meth, coke or crack, he/she would deffinitely do it
That's all i know about posers, if you spot one, fuck him, let it be
by victorfrombrasil January 09, 2010
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1.one who pretends to be someone whose not.
2. who tries to fit in but with exaggeration

An Avril Lavigne fan

"Like oh my god! She is not pop, dammit! She is totally punk rawk!"
by pool May 15, 2003
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
A person who attempts to blend into a specific social group.
Justin was such a poser-goth; sure, he comes to school in all black, but he doesn't even know who Edgar Allen Poe is.
by Paul Cannon October 01, 2002
a person - usually in middle or high school, who is insecure about him/herself and trys very hard not to be a "conformist" or a "prep," by doing things like: purchasing a skateboard or guitar, purchasing a great deal of clothing and accessories from hot topic, and listening to pop-punk bands such as simple plan, yellowcard, etc. usually, this supposedly "nonconformist" behavior just backfires on him/her, because now he/she is still conforming, just to a different group of people. so the moral of the story is to be yourself.
some people are posers.
by purple_stain69 February 20, 2005
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 February 14, 2005
A poser is someone who tries hard to be something they arent. Usually, posers call other people posers because they are jealous that the person they called a poser is more skater/stoner/goth/punk/rocker/grunge/etc. than they will ever be.
by Mary Mariegh June 21, 2003
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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