[[quoteright:313:http://static.tvtropes.org/pmwiki/pub/images/urban_dic_6025.png]]
->"Urban Dictionary is the slang dictionary you wrote. ''Define your world''"
--> -- Urban Dictionary

->"A place formerly used to find out about slang, and now a place that teens with no life use as a burn book to whine about celebrities, their friends, etc., let out their sexual frustrations, show off their racist/sexist/homophobic/anti-(insert religion here) opinions, {{troll}}, and babble about things they know nothing about."
--> -- Urban Dictionary's [[http://www.urbandictionary.com/define.php?term=urban%20dictionary main definition of itself]].

Created in 1999 by a college student named Aaron Peckham, the Urban Dictionary combines "anyone can add information" with a dictionary. It has currently recorded over four million words and phrases, mostly slang or slang usage. New words, definitions, and examples are submitted and then approved by the votes of both users and visitors. After that, the new additions are displayed for the world to see, forever.

Many of the terms defined are derogatory or describe sexual acts, so The Urban Dictionary is [[NotSafeForWork not exactly something a child should browse through unsupervised]]. It also gives personal opinions by contributors on certain subjects (bands, movies, books...), with contributors rarely considering the opinions of others. It can be useful for finding out how an unknown term is used, but don't trust it blindly; a significant fraction of the definitions are made up by the person contributing them.

Urban Dictionary offers a Word of the Day on its mainpage. For a long time, they allowed users to rate from the mainpage, resulting in large numbers of negative votes. This option was eventually disabled, largely preventing this.

Urban Dictionary can be found [[http://www.urbandictionary.com/ here]].
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!!Tropes:

* AuthorTract: More like "contributor tract" that is, most of the definitions tend to be personal opinions of the contributor.
* AccidentalPun: An eigenpun.
* BreadEggsBreadedEggs: The 2nd definition for the word goose as of writing is "A ram is a ram, a donkey is an ass, and a ram in the ass is a goose".
* ComicSutra: Almost every term will have at least one sexual definition, often one that's unlikely to exist outside the contributor's imagination.
* DoesNotLikeMen: Look up [[http://www.urbandictionary.com/define.php?term=Man "man"]] and [[http://www.urbandictionary.com/define.php?term=Misandry "misandry"]]. [[{{Spammer}} The same person]] who wrote the definitions posted them over and over again.
* FreudWasRight: [[{{in-universe}} They]] will ''somehow'' make ''any word'' related to sex.
* {{GIFT}}
* HeManWomanHater: The (formerly) most popular definition for [[http://www.urbandictionary.com/define.php?term=evil "evil"]]. Complete with InsaneTrollLogic.
** A majority of the most upvoted definitions for "feminism," "feminist," "woman" and "women" were this before the pages were discovered by actual feminists.
* HollywoodAtheist: Looking at the definitions for "atheism," some contributors are this. *HeadDesk*
** Also see definitions for "religion," "the bible," "God," etc..
* ImprobablyLowIQ: The most popular definition for [[http://www.urbandictionary.com/define.php?term=1 "1"]] is "The IQ of [[GeorgeWBush President George Bush]]."
* {{Jerkass}}: A lot of the contributors.
* NotSafeForWork
* PerfectlyCromulentWord: As noted, many of the terms are made up.
* PopularityPower
* PunnyName/ HurricaneOfPuns: Looking up "[[http://www.urbandictionary.com/define.php?term=jack+shit jack shit]]" will give you a "genealogy" of Jack Schitt and his extended family, starting with his mother and father (Awe Schitt and O. Schitt).
* SelfDeprecation: The most popular definition of "Urban Dictionary" as shown on top of this page.
* SchmuckBait: The "look up any word, like X" above the search bar sometimes recommends searching for "sex". If you do, [[http://www.urbandictionary.com/define.php?term=sex the top entry insults you.]]
* SophisticatedAsHell: A great many of the definitions are written this way.
* TakeThat: Many definitions are this.
* {{Troll}}: Many contributors are these. And '''very''' bigoted ones.
* ViewersAreMorons[=/=]TakeThatAudience: The first definition for [[http://www.urbandictionary.com/define.php?term=stupid "stupid"]]
** Also, the first definition for [[http://www.urbandictionary.com/define.php?term=procrastinate "procrastinate"]].
-->''"What you are doing right now. Get the fuck going and finish your homework."''
* UnreliableNarrator: Most of the definitions are way biased, or even entirely made up.
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