Urban Dictionary is a Web-based dictionary of slang words and phrases, which contains 6,690,137 definitions as of 23 July 2012. Submissions are regulated by volunteer editors and rated by site visitors.

The site was founded in 1999 by Aaron Peckham while he was a freshman computer science major at California Polytechnic State University. One of the first definitions on the site was “the man”, referring to “the faces of the establishment put in place to ‘bring us down'”.

The website was referenced in a 2011 District Court complaint by ATF agents to document the meaning of the vulgarism ‘murk’ as used in a criminal threat. It also consists of names and slang.

The definitions on Urban Dictionary are meant to be those of slang or ethnic culture words, phrases, and phenomena not found in standard dictionaries. Most words have multiple definitions, usage examples, and tags.

Visitors to Urban Dictionary may submit definitions without registering, but they must provide a valid e-mail address to facilitate the submission process. Entries become the property of Urban Dictionary. Before they are included in the dictionary, all new definitions must be approved by editors.

Editors are given this set of guidelines to use when approving or rejecting definitions:

1. Publish celebrity names but reject friends’ names. Definitions of first names are acceptable. Names of bands and schools should be published only if they are popular.
2. Publish racial and sexual slurs but reject racist and sexist entries. Entries can document prejudice and slurs but not endorse it.
3. Publish opinions. Opinions are useful to readers unfamiliar with a topic and should not be rejected because of disagreement or offense, or inaccuracy.
4. Publish place names, nicknames and area codes of geographic entities.
5. Publish nonslang words. Swearing, misspelling, or presence of words in an ordinary dictionary are not reasons for rejection and should be ignored.
6. Publish jokes and sarcasm, but reject inside jokes that only the author’s friends would understand.
7. Reject sexual violence and made-up violent sexual acts.
8. Reject nonsense. Be consistent on duplicates, reject nonsensical, circular, unspecific entries or those submitted in all capital letters. Non-English words and examples are acceptable, but entries with non-English definitions should be rejected.
9. Reject ads for web sites, and definitions written as advertising.
10. Publish if the definition appears to be plausible.

To use this web dictionary visit: http://www.urbandictionary.com/ or get free Urbandictionary app for Android.

Source: wikipedia.org