Top Definition
a gut that changes shape often; e.g. when person has a gut, loses it, and gains it back again; dervived from mercurial gut
What's with you? First you have a shitgut, then you go to the gym and get a ripgut, and now you're fat again. When is that mercgut gonna calm down?
by ShitgutSal March 23, 2004
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