A French exit
When a guy poops in a girl's mouth and she licks it all the way back in and then he shits in her butt and you end up eating her pussy with your face full of your own poop
My guy friend did this at the prom and I still haven't forgiven him.
She kissed the poop like it was a love potion and then he pooped in her butt like it was a surprise party.
I saw it happen in the mall food court and it was the worst thing I've ever seen.