German slang websites similar to urbandictionary.com
I use this site quit a a lot, especially for English scene forums or chats.
Anyone knows a similar site/online database for German slang words? Or translation service which shows at least well-known slang words?
Note that urbandictionary.com contains German terms itself! For example http://www.urbandictionary.com/define.php?term=K%C3%B6rperklaus