The name of a popular yo-yo trick, this spelling has fallen out of favor. The trick Kwijibo was originally titled as a reference to a Simpson's episode, when it is spelled Kwyjibo. According to Sector Y, it is unknown where or when the misspelling first came about. The spelling in context is notable because the word is invented by Bart in order to win a game of Scrabble. He defines "Kwyjibo" as "A big, dumb, balding North American ape. With no chin and a short temper."