The NYTimes.com dips into the latest slang with this: Language Quiz: Are You on Fleek? It’s fun to give it a try: I got 9 out of 12 and I have no doubt most people can do better. If you do worse, well by the end of it, you’ve learned a few new common slang terms.
If you want a better source for translating slang, you might want to head over to a site like this. Or wait long enough until The Oxford English Dictionary folks add it to the latest and greatest version of their book.