Uncyclopedia is a parody encyclopedia full of half truths, outright lies and deliberate distortions.
As such it is very similar to its sister site, Conservapedia, though on Conservapedia the humor is less intentional.
Ironically, Uncyclopedia in some cases is actually closer to the truth than Conservapedia. This was confirmed when Conservapedia stated that Uncyclopedia had a liberal bias, indicating that it is closer to reality.
Uncyclopedia has an article on Conservapedia  and on "Bias in Conservapedia" . RationalWiki has been honored with an Uncyclopedia article, as well. It presently has article on EvoWiki  and on Liberapedia .