A perfect butt; smooth, round and soft. Often used in a homosexual context.

A big, fine round ass. Most black girls and many white and latina girls are blessed with these anatomical masterpieces. They are as fun to watch and just as fun to grab.

A butt that is round, sexy and plump. It is shaped like a bubble and it shows on a person's figure.

A girl with a round, full ghetto-butt.

When a girl has a really nice, round, and firm ass but its small

A much sought after attribute in the male homosexual world. A guy with a bubble-butt has a nice, round, full buttocks. Often found in dancers and ice skaters.

an ass is very round and "bubbly"