Second star to the left's definitions
Somone who tries to fit in with a group of people. They obviously do not fit in but try their hardest to conform to this group people and usually end up just being a liar and a fake.
Alex tries so hard to fit it with Kara and Kately that she lied about hooking up with JT, just because Kara and Kately are sexually advanced, aka she is being a poser.
by Second star to the left December 17, 2008
Get the Posermug.