A person whose compulsion is to run to a dictionary at every opportunity.
John is such an addictionary that he never gets past the headlines.
Someone addicted to Urban Dictionary
Guy 1: What the hell is an iFinger?
Guy 2: I don't know, look it up on Urban Dictionary
Guy 3: No need guys, it's when you purposely keep clean when you eat something messy so you could operate your touchscreen smartphone/tablet/GPS without making the screen look like your plate.
Guy 1: Since when did you become an Urban Addictionary?
A person whose compulsion is to navigate to the urban dictionary site at every opportunity.
John is such an urban addictionary that he hasn't seen a real dictionary in years.
spending an hour or more being sucked into the wormhole of urban dictionary
guy: i was on urban dictionary for over an hour just looking at the weirdest definitions i could find
man: it should be called urban addictionary
guy: yea