The words I almost always use way too much are that, just and even. I think everyone uses "that" a lot. Colloquialisms...hmmm. Honestly, I don't think I use too many because I try to avoid them and come up with something new. I can't think of any at the moment, at any rate. Great post, though! I've never heard "hotter than a tin toilet seat" but that made me crack up!