This is an abbreviated form of "Karolus", Latin for Charles, which Charlemagne (Charles the Great) used as the monogram to authorise documents. Basically, I pinched it, and now it's mine.
I used to use Wikipedia all the time. When I came across the BJAODN I was obsessed with the hysterical hilarity of it. However, in time, I came to realise that BJAODN had lost its edge: no longer was it a collection of side-splittingly and unbearably funny comments, but it had become a hive of lame vandalism that was only created in the hope that it would find its way there - and of course, at least one idiot would find it funny.
Uncyclopedia lacks the monotony and unfunniness of latter-day BJAODN, and is consistently fresh. Why do I like Uncyclopedia? Like Wikipedia, it is a community. But not one consisting of a multitude of intellectual snobs. Uncyclopedia is synonomous with fun. And the inside jokes!!