Fagin is a fictional character and the secondary antagonist in Charles Dickens's 1838 novel Oliver Twist. In the preface to the novel, he is described as a "receiver of stolen goods". He is the leader of a group of children whom he teaches to make their livings by pickpocketing and other criminal activities, in exchange for shelter. A distinguishing trait is his constant and insincere use of the phrase "my dear" when addressing others. At the time of the novel, he is said by another character, Monks, to have already made criminals out of "scores" of children. Nancy, who is the lover of Bill Sikes, is confirmed to be Fagin's former pupil.

Oliver Twist; or, The Parish Boy's Progress, is the second novel by English author Charles Dickens. It was originally published as a serial from 1837 to 1839 and as a three-volume book in 1838. The story follows the titular orphan, who, after being raised in a workhouse, escapes to London, where he meets a gang of juvenile pickpockets led by the elderly criminal Fagin, discovers the secrets of his parentage, and reconnects with his remaining family.