Also, a poser can be one who says they can do something that they can't.
Or more commonly, a poser is someone who, when doing something successfully, takes more than enough credit for it.
They also like Anything thats popular and usually don't know any music beyond mainstream. Loves to jump on bandwagons and bash things other people bash. They love to be "cool", they will try to call YOU a poser, even though you aren't labeling yourself, like they are.
Oh, and if you call Good Charlotte posers just because everyone else does, you're technically THEE poser, because you're being a conformist. I don't like Good Charlotte anyway, but people need to stop bashing them.
Me: Alice In Chains
Dumbass Poser: OMG WTF WTF UR A POSER!!! LMAO!! LOLOLOL!!!
Me: I never even labeled myself, so technically I am not a "poser".
Dumbass Poser: UH HUH CUZ U LYK ALICE IN CHAINS N THEY R NOT COOL
Me: um Okay...So...what is your favorite songs by My Chemical Romance?
Dumbass Poser: um...i lyk all of them:)
Me: Suuure you do.
sk84life: oh awesome...wut is it?
stephen22: um i donno man ...its blue and white...ermmm....ya
sk84life: man get it together... all the guys are talkin bout u now.
stephen22: wut? why?
sk84life: man they r sayin that u are a poser...
stephen22: well...i'm not?
sk84life: when u dont know wut your own board is then we have a problem
This word is especially popular in rambling, misspelled sessions on AIM.
2. "omg u r not punk u preppy POSER!!!!!!!1!!!"