Being when you make a mistake, use a word that doesn't exist, then try to claim that English is a "living language" where making up words is all good. It's not, really. We already have lots of really good words. Refudiate isn't one of them.
Coined when Sarah Palin defended her repeated use of the word "refutiated" by Twittering that English was a living language and that even Shakespere made up words!