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"Unfortunately most common English swear words have gender-specific connotations. But there are a couple that can be deployed for Sarah Palin that will leave no doubt that she is being insulted for something other than her gender: dumbass and asshole. The first is particularly apt for the Couric interviews, and the second applies well to her vicious, fact-free attacks on Obama."
I thought about this more AFTER posting and you're right, those both work just as well and aren't/don't sound sexist.
In fact, none of these words, to me, convey what it is about her that I find quite disturbing. We who perceive this all know what that is, who cares to try sum it up in a word or phrase?