1 definition by vroompac

Top Definition
When two or more individuals expel flatulence with a wretched order and they combine within a close proximity of each other, creating the perfect storm of stench.
On the ride home the next morning from the bachelor party, that included copious amounts of beer and tacos at 2 am, two anonymous passengers busted ass at the same time, creating a PooNado that reeked havoc on everyone in the car, causing the driver to pull over so they could seek refuge.
by vroompac January 11, 2011
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