(Adjective) Someone who's knowledge and/or vocabulary is mainly comprised of terms found on Urban Dictionary.
Joe: Hey, chums! Last night's homework gave me the 1 yard stare.

*privately*
Dan: What's up with Joe? He's talking weirdly.
Alice: Yeah, he goes to Urban Dictionary a lot. He's got Urban Knowledge.
by lemonlad7 May 4, 2011
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