Answer:
If you go to a category (you can do this by clicking on the category under a question) you will see a short description.
Urban Slang:
"An informal spoken language made up of current coinages, phrases or words that are used in place of standard terms for added emphasis, humor or other effects. Basically, the lingo used by peeps to talk about mad shiz and holla at their homies."
Vintage Slang:
"Groovy terms from the past that's the berries!" - Basically, slang from the past.