A condition in which the editors of a popular website forget to fulfill their mission as a vital conduit for the evolution of English vernacular, as spoken by the people on a regular basis.
Instead of focusing on the mission, they opt to include and proliferate forced, unwitty and often juvenile standards that instead creates a forgettable, unreliable and unusable reference for the future.
By approving seemingly every entry, and by setting a low quality standard, Urban Dictionary has forgetten why it exists and has acquired Urban Purpose Amnesia. There appears to be a disregard for the quality of examples, and whether they are insightful, funny or coherent. Pundits do not believe Urban Dictionary can survive as a medium for the English language on its current course. In fact, previously well placed entries may also be ignored, rendering the web site's entire existence meaningless.