A fork of Rural Dictionary
When a man's penis enters his own butthole. This most often occurs by accident during an extreme sex act but has also been performed solo, hands free, by a very talented few.
Yo... I gave myself the loopty loop last night while pile driving your grandma.
Loopy loop: when you and your bud/buds go on back roads drinking, so you won't get pulled over by the 5-0.
Me and Jay went on the Loopty loop and ended up 50 miles from the crib.