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1.
An explosion of fat rolls rippling through mid air due to some type of heavy impact or sudden lack of support.
"Dude! When those sumo-wrestlers collided, it was a total fatsplosion!"

"I swear. If she eats one more morsel of food, her belt is going to snap and there will be a fatsplosion of massive proportions."
by Caileth June 18, 2010