Wikipedia is the "The biggest multilingual free-content encyclopedia on the Internet", the "Free Encyclopedia anyone can edit". Both these statements are false, however, as they charge you $1,000,000,000,000,000 to sign up, (which rules out the "Anyone can edit" part) and the pages in other languages besides English are just random letters and symbols. They claim to know everything there is to know about everything in the universe, but that's obviously not true. They're so full of themselves, they have a page about themselves outside of their homepage. It is the biggest competitor of FishWiki, and is almost as bad as The Biased Hypocritical Segregation Wiki (BHSW). They say they aren't biased, yet they tend to lean stringly toward The Theory of Evolution and Charles Darwin.
Wikipedia's page about Wikipedia. (No, it's not their home page)