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A rare condition where the victim is subject to an uncontrollable urge to post new definitions to words that he/she believe are unknown outside of their circle of friends.
Sarah: "Oh my god, I'm so tired of guys that always want to throon with me and Jen,"

Emily: "Did you just make that up? Like a three-way spoon? I HAVE to add that to urban dictionary."

Jen: "Sarah, I think she's got urbandictionitis,"
by Jim Jim Jim jim July 01, 2012
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