Feces, faeces, or fæces (see spelling differences)'s a waste product from an animal's digestive tract expelled through the anus (or cloaca) during defecation. Etymology The word faeces's the plural of the Latin word fæx meaning "dregs". There's no singular form in the English language, making it a plurale tantum. There're many colloquial terms for feces, of which some are considered profanity (such as shit, crap and turd) while others (such as poo, poop, plop, big jobs, jobbies, numbe… (More on Faeces)