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