Verb: a once in a lifetime sexual intercourse. It occurs when a man has explosively chunky diarrhea and gets into a doggie style position with the ass slightly raised. He then proceeds to project the contents of his anus into the gaping mouth of his partner.
My partner and I made a huge mess last night while practicing the Artesian Fudgeball. It was totally worth it though, since it's an extra-rare occasion.