Abbreviation of "Urban Dictionary Word". When you use a new word from Urban Dictionary that no one actually knows, and they ask you what it is, you tell them it's a "UDW".
Girl 1: OMG, have you seen Jared? He is such a lesbro!
Girl 2: What the heck is a lesbro?
Girl 1: It's a UDW, it means a guy who hangs out with lesbians.
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When Urban Dictionary Editors don't post good definitions because 1) it offended tweens 2) cuz they're are wankers.
UD editor: :O OMG that's is racist against tweens and black people
UD publisher: You're a Urban Dictionary Wanker (UDW)
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