I've grown to hate words that my students (and others) routinely misuse. For example, "apart." As in "Now that I am apart of this neighborhood, I look forward to the next block party." Um, no. I'm always tempted to say, "Don't you mean 'apart from'?"
"Anywho" just drives me up a wall. First of all, I hate it. Second, if you're going to write it, at least spell it "anyhoo."