I agree with the whole lot, slang does get old regardless of the word, but I think there is a good exception to the slang family that I don't think will ever get played out, cuz it really hasn't yet because of it's subtlety.... And that's "Man".. everyone and their grandfather has been using this form of accentuation without really even noticing it, but it is in fact slang. That's the #1 slang word in my book, I think it will be many moons before that dies out. All classes of people use it because it is such a general form of expression, it's basically a verbal exclamation point.