Top definition
Sexual act involving the swapping of vomit back and forth between the mouths of two or more people.
Jack and Patty spent the evening bileballing after spreading plastic sheets on the floor.
by Paul Wolf January 27, 2009
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

Alphabetical list