Stercolith is a medical term referring to a hardened mass of feces within the colon, also known as a fecaloma. There are several synonyms for stercolith, including fecalith, coprolith, and fecal calculus. Fecalith and coprolith are both derived from the Greek words for feces, while fecal calculus is a Latin term describing a hardened stool. Other informal synonyms for stercolith include poop stone, butt rock, and turd nugget. Although these terms may seem humorous, the presence of a stercolith can be a serious health concern, often requiring medical intervention to prevent complications such as bowel obstruction or perforation.