Top Definition
Where a fat, or generally unhealthy person, exherts themselves to the point of collapseing, whether its through trying to conquer the stairs, runningafter the bus or any other physically demading exercise.
"Hey, did you see tyler james logan running after nudey rudey! he totally lost it and just had a Fattycollapse after about 30 seconds!"
by mrHarvey October 20, 2009

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