The Uncyclopedia

So, the beauty of Wikipedia is that you have an encyclopedia that anyone can edit. Because you have millions of editors, you are sure to have on-the-spot information and, of course, correct grammar.

Turn Wikipedia on its head and you have the Uncyclopedia. Like Wikipedia, its also runs on a wiki and relies on its visitors for information and the update of information. However, the objective is the opposite - you can be as far from the truth as possible. As long as its funny.

Think Wikipedia + The Onion.