champagne tower
This is what really happens when a bunch of girls use the bathroom together. They all take their pants off and stack one on top each other on the toilet. Then then go pee and it becomes like a urine champagne tower. The champagne tower is also known as "stacking".
Person 1: Where did Stacy go?
Person 2: Champagne tower will Mary.
Person 2: Champagne tower will Mary.