An extremely filthy version of sex. It starts when Person A begins to have a bowel movement. Just as the shit is about to exit the anus, Person B inserts his penis. Then Person B removes their penis and proceeds to shit into Person A's mouth. Then Person B inserts his shit-covered penis into Person A's mouth. After mixing up the shit, Person B removes his penis and inserts it back into Person A's anus.
You think sodomy is bad? Try doing the Gomorrah