The creator of BG Jargon described it like that “The knowledge of the street, the dictionary of one-day-words, of the obsolete words and pretty much everything that you can’t find in any other dictionary or encyclopedia.”. For me, creating the website was a fun process. A process that gets so prolonged that when the design is finally coded, it is already morally old.
In the beginning it was just the original creator who published new words but later on other linguistics-friendly people joined in this initiative and continue his testament. So if you feel less educated on the Bulgarian jargons, this is the place.
There is also a more detailed blog post about it here.