It seems that Sarah Palin has come up with a portmanteau word: refudiate, combining refute and repudiate. I have two reactions:
- I won’t use the word myself, and I don’t recommend adopting it. Refute or repudiate work fine.
- I won’t dump on Palin for using the word herself. When she uses it, I know instantly what she means. If the listener instantly understands what the speaker is saying, then the speaker has done her job.