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Does not exist. If it did exist; the definition would be 'someone trying to be a certain stereotype'. However, most people define it in their heads as 'someone who isn't whoever/whatever they are trying to be because; 1, if they have to try then they are fake, or 2, they are trying too hard and failing'. Both of these reasons are judgmental and highly unintelligent. If using the word to refer to someone else, the user is generally saying it to make themselves feel higher than the other because the user feels insecure or low. What the word, in all honesty, really is? A lie.
Insecure 1: "Look at that girl. She tries so hard to be scene. What a fake."
Insecure 2: "Seriously. She fails so bad. What a poser."
Intelligent Life-form: -laughs- "Its funny because I know that the only reason you're saying that is because you're trying to make yourself look better. It's also funny since the only reason you're doing that is because you're insecure about your own self. -laughs- ...and you say she fails."
by Teckadoll November 29, 2012
1 0
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
8544 2097
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
4050 1279
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
3490 920
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
2712 759
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
1998 588
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
1545 548
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
1197 364