Urban Dictionary is a slang dictionary with your definitions

Urban Dictionary is a slang dictionary with your definitions. "Urban Dictionary: a self-edited online resource, but unlike Wikipedia, it allows for many truths, rather than one authoritative guide."

I found it "googling" and it is very good. You can finf words you just don't find in any other dictinaries.

It has even got a RRS service --> subscribe to urban word of the day (it's free).

Hope it is helpful for you as it is for me.

PS: try to find "bitchslap" in any other dictionary...

http://www.urbandictionary.com/