Urban Dictionary is an online dictionary with definitions written by its users. It is a crowdsourced platform where anyone can submit their own definitions of words and phrases. The website was founded in 1999 by Aaron Peckham and is used to define contemporary slang and informal words. It has gained a huge following over the last two decades and is now one of the most visited websites in the world. It has over 8 million definitions, and is constantly updated with new words and phrases. It is a great resource for those looking for definitions of modern slang and to stay up to date with the latest trends.

Due to the way the algorithm works, the thesaurus gives you mostly related slang words, rather than exact synonyms.urbanthesaurus.orgThe official Urban Dictionary API is used to show the hover-definitions. Note that this thesaurus is not in any way affiliated with Urban Dictionary.

These indexes are then used to find usage correlations between slang terms. The official Urban Dictionary API is used to show the hover-definitions.urbanthesaurus.orgThe Urban Thesaurus was created by indexing millions of different slang terms which are defined on sites like Urban Dictionary.

For the first five years, the site generated revenue but did not make a profit.en.wikipedia.orgHe created Urban Dictionary initially as a parody of actual dictionaries, which he thought tended to be "stuffy" and "take themselves too seriously".