The Great White Butt is an enormous butt, from Teletoon's The Day My Butt Went Psycho!, the evillest butt in history. Some say the Great White Butt was a mutant bum created by a side effect of a nuclear butt launcher. Others believe it was around for years. In his book, 'Chariots of the Butts', Eric Von Dunnycan (fictional) claimed that it was a space traveller. It was forcibly removed from Earth by Zack Freeman, who sent it blasting into space.
Possibly a mutant. Or from outer space. Or maybe even the result of a Government experiment gone horribly, horribly wrong. Evil to the core, he hates humans and all humanity.