A "human centipede" refers primarily to a concept from the 2009 Dutch horror film The Human Centipede (First Sequence) , directed by Tom Six. In the film, a deranged German surgeon kidnaps three tourists and surgically conjoins them mouth-to-anus, creating a single digestive system shared among the three people, thus forming the "human centipede." The victims are physically connected in a line, forced to live as a grotesque biological entity, with the middle and rear individuals having their mouths and anuses surgically connected, preventing normal movement and causing severe suffering
. The film's premise is inspired by a dark joke and historical references to Nazi medical experiments. The surgeon, Dr. Josef Heiter, is portrayed as a retired expert in separating conjoined twins who now pursues his twisted vision of creating new creatures by sewing humans together. The film explores the horror and psychological trauma of this forced surgical fusion, making it a disturbing body horror story
. In summary, the "human centipede" is a fictional, horrific surgical creation where multiple people are connected in a chain via their digestive tracts, as depicted in this controversial horror movie