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1.
When a person with a public voice makes a vocabulary blunder. Usually creating a whole new word, ie; "misunderestimate". Then after being called on the mis-speech, they claim to be right, or "selfjustified".
Ms P; I don't want to unelaborate on this topic, but truthyness is a big overatism.

Reporter; Boy, just listen to all that Palineism!
by Mister Toad January 03, 2011