noun. A staunch advocate of the notion that Homer Simpson is correct and we are all merely sprinkles on a heavenly donut.
Real citation: "Recently some astronomers proposed that the universe is shaped like a gigantic donut. Then a competing group proposed that the universe actually is shaped like a gigantic soccer ball. The cosmic-doughnut group, based at the University of Pennsylvania, took exception to the cosmic-soccer-ball gang, who are mainly French academics. Cosmic-donut supporters asserted if the whole universe is a soccer ball, then individual views of the sky should resemble a sliced bagel."
(Gregg Easterbrook, "God did not watch the Super Bowl, but everybody else did!" http://www.superbowl.com/news/story/8173992)
Made-up citation: "I'm no cosmic-donut supporter, but Christ in a Christmas tree, do I ever support Dunkin' Donuts coffee."