When two guys have anal sex with each other at the same time. Guy A fucks guy B in the ass while guy B fucks guy A in the ass. Also known as reverse analdouble butt fucking.
A threesome with two guys and a girl, where one guy is hitting it from behind, and the other guy is getting a blow job. The guys are high-fiving over the girl to make the eiffel tower shape with shit covered hands
Giving someone an enema of crude oil, putting a stopper on their anal cavity and puncturing a hole in the stopper guzzling the oil as it escapes the anal cavity at a high velocity.
When two partners engage in anal sex and the receiving partner has explosive diarrhea and the giving partner jams his meat sock in their ass, causing pressure to build up and then suddenly pulling out and the diarrhea comes spilling
This is the female equivalent of seagulling, it is when a female collects her "juices" in her hand, flings it at someones face and then shouts "oilrigging"