The act of taking one's penis, navigating it through their gooch, tucking it under, fitting the tip inside of their rectum, and proceeding to urinate past their sphincter.
Guy: "Dude guess what!"
Guy: "I got these new pills and they enhanced my unit, now I am able to Auto-urenemate!"
Dude: "That's fucking awesome! I need to get me some of those, my sphincter is parched."