Hail Mary
when you're trying to take a dump and you're too lazy to do it right, so you just fling your butt over the toilet like a madman
He flung his butt over the toilet like a wild animal. That was a Hail Mary.
He missed the toilet and crapped on the wall. Total Hail Mary.
He dropped his pants and flung himself over the toilet. That was a Hail Mary.