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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A foul explosion of poo that leaks out of clothing.
My daughter had a poonado and it exploded out if her onsie getting her back and hair covered in feces.
by SomervilleRocks July 07, 2009

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1. The utterly foul and disgusting blanket of odor that seems to follow someone out of the bathroom and rips down the hall after performing excessive amounts of defecation in the bathroom. Like a tornado, its measured on the Fujita Scale.
1. After walking out of the bathroom and not closing the door, Davin completely unleashed an F5 PooNado on the entire office.
by Travis w. T February 13, 2009

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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A small isolated but powerfull shit storm hitting board rooms and classrooms nationwide
The boss was pissed and unleased a poonado on the conferance room.
by ddeckchair May 03, 2010

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt