A "Rat King" is a phenomenon where several rats become intertwined by their tails, often due to sticky substances or entanglement. This rare occurrence can result in a group of rats living and moving together as a single entity. The term has historical roots and has been documented in various cultures, often associated with folklore and superstition. The concept of a Rat King has also inspired various works in literature and art, symbolizing chaos or the darker aspects of nature. While the actual occurrence is uncommon, it has sparked curiosity and intrigue, leading to discussions about animal behavior and urban ecology.