A coworker or boss who chooses sides on any given issue based solely their desire to fit in.
Sanchez totally sided with the staff accountants in that meeting so they would give her a "you go girl!" in the company cafeteria. Last week she chose to hang with Legal so she could be invited to their Happy Hour. She's a total poser!
1. Someone who tries to be something their not (triesto be popular)
2. Ditches real friends for ones that are more popular, than proceed to make fun of old friends
3. Someone who is often used see: tool
Dylan became a poser when he ditched his friends to try to be cool and made fun of them. He also makes fun of his girlfriend behind her back.
Someone who acts like they can do something when really they just want attention. People who think that by actting like they can do something that everyone else can or cannot do they are instintly popular and/or noticed.
* Bella was being such a poser when she said she was in AV club. She's as dumb as a rock.
* Leo is such a poser. He always acts like he can skateboard but really he can't even do a 360. Even I can do that.