Sweeney Todd, the fictional character, is a renowned figure in English literature. He is a barber and a serial killer who murders his customers with a razor and then sells their bodies to a pie shop owner. To avoid detection, Todd changes his identity, and there are several synonyms that refer to him. Some of these synonyms are "The Demon Barber of Fleet Street," "The Demon Butcher," "The Barber of Pit Street," and "The Barber of Fleet Street." These synonyms emphasize his gruesome and terrifying reputation, making him a popular character in various adaptations, including plays, movies, and musicals.