The act of being really lame and leaving your best friends hanging for a really bad reason.
Dude, don't douche out on me.
by Medianoche April 28, 2007
A contest between two douches to discover which one is most douchey.
Ben Affleck and Matt Damon in the film Dogma performed a doucheout (Affleck won... Affleck always wins, except at life and acting).
by bunnymessiah June 29, 2009