A womens derriere that has the shape of, and bounces like a basketball. The word is derived from the sound produced when you bounce a basketball. A case of the sound of one urban icon, naming another urban icon with similar propensities but that doesn't really make a sound.
A female's backside that is so mouth-wateringly delicious you find yourself masturbating to the image of it night after countless night; Is the ultimately highest compliment a woman's backside can recieve.