A butt belonging to the community as opposed to a butt belonging to a single person. For example, those with questionable morals may have a butt belonging to a group of people or the community as a whole.
Jeremy: "I don't want a girl with a community butt."
Kyle: "I understand. You want a privately-owned butt."
Kyle: "I understand. You want a privately-owned butt."
by double.k January 25, 2011