What does Bum Balloon mean?

Bum Balloon meaning in Urban Dictionary

An action that develops during anal sex in which the feminine has been pushed nearly upsidown together anus pointing up, the rectum starts letting air flow in and while the male is thrusting the air is forced out creating a false fart. The minute where in actuality the air is inside colon is called a bum balloon, its much like a Qweef.