1. Noun. Someone who uses Urban-Dictionary definitions to try and prove a point - either seriously, or in an attempt to troll.
2. Noun. Someone who believes that something added UrbanDictionary.com is somehow validated.
3. A total n00b.
"He dragged up 'definition added to UrbanDictionary.com' as if that meant something important. Yeah - look, buddy, I can make something up right now, and get it accepted - UrbanDictionary.com doesn't exactly proofread and research every entry they get. God, what a total bathy!"