When a woman farts whilst having anal sex.
Oh shit, bitch! Did you just billow? Now my one eyed viper's got pink eye.
by Matt McDouche December 17, 2008

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Top Definition
The quality of having or being billowy, cloud-like, fluffy, or otherwise over-flowing. Often used to refer to ladies with big, squishy natural breasts that you wanna sink your face into
Im always on the search for billows that way i can rest my head without bringing around a bunch of pillows
by trixxy b damned November 10, 2006

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Play on the words "butt" and "pillow".
"Aw man this seat is uncomfortable. Can i have a billow?
by ILikePieSalad September 21, 2013

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Boobs that can be used as pillows
I was tired after the party so I ended up on her billows
by Pugy May 10, 2016

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A large gust that places an extraordinary amount of cocaine up your nostrils.
Josh just billowed the whole mound!
by Dotticus May 28, 2017

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