My mother always said "toot" when I was little. In junior high school, we always said "cut the cheese." My husband's grandfather says "stepped on a duck" or "stepped on a frog." But the cutest one by far was one of my students a few years ago, who came up to me and confided in a whisper that he had just "popped a fluffy"! I still use that one!
This makes me think of Lisa too! Is something wrong? Is she not around? She'd be all over this thread!