Top Definition
When one is under great stress and they fail to perform and instead completely shit their pants. Like Joe Flacco does every time he playes the Steelers.
Joe Flacco tried to show up to Heinz Field in the playoffs but Dick LeBeau gave him bad Flacculence. He Flacculated all over the place.

Fred went to the club to hook up with Julie W. but he had bad flacculence and struck out.
by fred-berg January 15, 2011

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