Vukajlija is similar to the online dictionary of slang founded in what year?
1999
Title: Urban Dictionary
Passage: Urban Dictionary is a crowdsourced online dictionary of slang words and phrases that was founded in 1999 as a parody of Dictionary.com and Vocabulary.com by then-college freshman Aaron Peckham.  Some of the definitions on the website can be found as early as 1999, but most early definitions are from 2003.  At the start of 2014, the dictionary featured over seven million definitions, while 2,000 new daily entries were being added.  In November 2014, the Advertise page of the website states that, on a monthly basis, Urban Dictionary averages 72 million impressions and 18 million unique readers.  Anyone with either a Facebook or Gmail account can make a submission to the dictionary, and it has been stated that entries are reviewed by 20,000 volunteer editors.
Title: Vukajlija
Passage: Vukajlija is a popular Serbia-based web site very similar to Urban Dictionary in content.  As such, the site mainly consists of often humorous definitions, observations and (not rarely vulgar) explanations of slang terms from a more local point of view that the one on Urban Dictionary.
Title: Plattmakers
Passage: Plattmakers is a Low Saxon online dictionary project.  With more than 18,500 word entries (as of August 2013) it is one of the most extensive Low Saxon online dictionaries.  As each word entry can be rendered in several different Low Saxon varieties its effectively the most extensive Low Saxon dictionary available.
Vukajlija Urban Dictionary