http://en.wiktionary.org/wiki/excoriate :]
You shouldn't use such necrotically vernacular language.
It can sometimes can be a bit dodgy but I think a well-maintained wiki page can be one of the best references around, as long as you check the history to make sure the last edit wasn't a vandalism. With the biggest pages, any vandalism is generally reverted in a matter of minutes.
But yeah, if you are going to use it, I guess you should at least cross-reference it just to make sure.