When you have a fat pimple on either one of your butt cheeks. This pimple makes your butt cheek/cheeks look like a boob. The cheek of the butt is the breast, while the red pimple is the sexy nipple!
Oh my gosh! You have such a sexy butt - boobie. Can I get your number?
by Butt Sav January 7, 2011
Get the Butt - Boobie mug.
A butt with nipples
I have a booby butt
by $hades November 22, 2013
Get the booby butt mug.