Definition & Meaning of "anal gravy"in English

What is the origin of the term "anal gravy" and how is it used?

"Anal gravy" is a slang term for fecal matter expelled during anal sex. It likely appeared in late 20th- or early 21st-century English in informal, sexual, or online subcultures. The term combines "anal" with "gravy" as a crude metaphor, using a food image to describe the substance in a graphic, vulgar way. It is used in sexual, joking, or shock-value contexts among peers or online. The term is highly vulgar and explicit, never neutral, and inappropriate in polite or formal conversation.