I've had a while to think on Sarah Palin's weird little portmanteau "refudiate," and I find that I like it. It adds a single-word shade of meaning that encompasses both refutation and repudiation at one blow. But then, I'm usually happy to embrace new words into my vocabulary... they just aren't usually so highbrow. I'm partial to the dichotomy embodied in words like "shitastic" and "craptacular," for example, when attempting to express overwhelming levels of suckitude. Incidentally, I'll also say "underwhelmed" and have actually said things like, "moderately whelmed" when the occasion calls for it. My vocabulary also incorporates such phantom adjectives as "ginormous" at times.
Go ahead, pelt me in rotten vegetables or whatever. I don't care. And I'll still come out swinging with my second-person plural every time, y'all. Don't misunderestimate me.