a phrase used to describe the act of two holes or openings pounding or touching each other. See also Donut Bumper - one who participates in/enjoys bumping donuts.
by Will C. December 12, 2003
by Lesbihonest73 April 19, 2017
Did you see jane and Denise last night? They were totally donut bumping all night in front of everybody!
by Ryan A H April 26, 2006