(N) an urban poser is someone who writes their own names on Urbandictionary and makes they're name sound incredibly cool or awesome when in reality it is not.
Guy 1-"hey dude, I just added my name into Urbandictionary
Guy2-"cool. Lemme see...'A totally awesome guy that has a huge dong and gets all the ladies'.
Guy 1-"doesn't that describe me perfectly?"
Guy 2- "dude you're such an urban poser.