While your friends are having sex in another room, jerk off to the sound of them having sex. Right before you blow your load, bust into the room and jizz all over both partners
"dude, last night I got caught pelicanning John and Cindy"
The act of having violent diarrhea during sex; usually occurs after eating poorly made Mexican food and leaving a "spicy" feeling left for both partners
"I had the worst case of bangorrhea last night bro, I still haven't cleaned it up. My moms pissed!"