Anti-Claus is an injoke we're desperately desperately trying to get popular. It's not working. However, we felt that it'd be a good idea to give it a wiki page. Because the best way to handle an in joke between friends is to officialize it. Then it won't get tiring!
Anti-Claus was created at the same time as Anti-Christmas, the holiday of his creation. Anti-Christmas is also known in some areas as Hanukkah. As a renown jew, Anti-Claus hates anything having to do with Christmas or fun.