A social climber . Someone who hangs out in an environment or neighborhood more exclusive than their own.
Dude #1: Who is that guy, I see him everywhere lately.
Dude #2: I hear he still lives with his parents on Long Island.
Dude #1: Oh, a Park Slope poser.
Dude #2: I hear he still lives with his parents on Long Island.
Dude #1: Oh, a Park Slope poser.
by shakerrr January 19, 2011