Place it as the punchline after a short bathroom setup, following a fart sound for the gag and then cutting to a Vine Boom for the reaction shot, so the edit moves from setup to statement to impact.
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This short spoken clip delivers the blunt line 'poop is diarrhea' in under three seconds, with a flat, matter-of-fact delivery that makes the crude statement land harder. It feels silly, gross and deliberately awkward, the kind of bathroom humour that gets a laugh precisely because it states something obvious in the worst possible way.