Coprophagia (/ˌkɒprəˈfeɪdʒiə/ KOP-rə-FAY-jee-ə)[1] or coprophagy (/kəˈprɒfədʒi/ kə-PROF-ə-jee) is the consumption of feces. The word is derived from the Ancient Greek κόπρος kópros "feces" and φαγεῖν phageîn "to eat". Coprophagy refers to many kinds of feces-eating, including eating feces of other species (heterospecifics), of other individuals (allocoprophagy), or one's own (autocoprophagy). Feces may be already deposited or taken directly from the anus.[2]
In humans, coprophagia has been described since the late 19th century in individuals with mental illnesses and in some sexual acts,[3] such as the practices of anilingus and felching where sex partners insert their tongue into each other's anus and ingest biologically significant amounts of feces.[4] Some animal species eat feces as a normal behavior, whereas other species may eat feces under certain conditions.