A cool site on the ultimate American slang that I believe would be of help to those wanting to figure out "what's going on".
An alphabetical list of common American Slang
Check out this cool guide to American slang, including popular songs and movies, bad words, body parts, and a fortune teller.
A research slang dictionary that allows you to search for the decade of slang or search meanings for different slang words with the same meaning.
Learn about the rap lingo; get educated.
A video language library of slang, idioms, and other peculiar language.