An instance in which two or more people (human or otherwise) touch their individual butt-holes to that of another person.
by HumanButterfly enthusiast April 19, 2020
When you press your anus against a willing participant’s anus and shit with such force that the excrement goes inside of the second party. The two stand in a way so that the group’s shadow looks like a butterfly.
by Motorpatrol August 01, 2019