We have stumbled upon a gold mine here. One of our friends used to work at a kid's web site where the staff had to compile a bad word list. The goal of the bad word list is to collect all offensive language that visitors have used or could use as screen names or in comments sections and enter them into a database. That database then censors those words if they are used on the site. The list is a living document and the staff adds any deceptively spelled swears that sneak their way onto the live site undetected.
Recently, our friend found one of his old bad word lists and, boy, is it a doozy. Since the number-one goal is to catch language that could in any way possible be deemed inappropriate for children, the list is quite extensive and has to cover a lot of bizarre and filthy username combinations. It's too long to post in its entirety, so we just singled out our favorite words below. Keep in mind, sites have to account for workarounds (like digits in the place of letters), so don't worry about unfamiliar spellings, just worry about how to incorporate "mastrabator" into your vocabulary.
wuutang (Why is this offensive? And more importantly, why is only a mis-spelled version of Wu-Tang Clan offensive?)