Top Definition
A "silent, but deadly" fart that is so heinous, it clears an entire room of people in mere moments. Worse, it lingers far longer than a run-of-the-mill SBD, preventing occupation of said afflicted room for several minutes. It's ability to empty an area of all living things is legendary - and feared.

The likelihood of dropping such a lethal package is greatly increased by ingesting copious amounts of oats and/or beans - especially when also taking NyQuil.

The flatulence equivalent of a Neutron Bomb. Also known as the DefCon 4 of SBDs.
Felix: Dude, why did everyone run screaming out of the gameroom? Could it have something to do with the fact the gameroom now smells like a dirty diaper?

Chester: Yeah, that fat slob Bosco dropped a brutal fizzart! That was ten minutes ago, and it still smells like ass in there.

Felix: Damn, that's a fucking Pootron Bomb!
by SwordofDamocles November 24, 2010

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

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

Buy the mug

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