A gas lighter is not a term that refers to a physical object or device. Instead, the term "gaslighting" refers to a form of psychological manipulation in which the abuser attempts to sow self-doubt and confusion in their victims mind. Gaslighting is a method of gaining control over someone else by breaking down their trust in themselves while increasing how much they trust or depend on the abusive person. The term "gaslighting" comes from the 1938 play Angel Street, which Alfred Hitchcock later adapted into the film Gaslight, in which a man tries to convince his wife that she is going insane so he can steal from her. Gaslighting can occur in any type of interaction, but it is especially common in intimate relationships, where an abusive person may use gaslighting to isolate their partner, undermine their confidence, and make them easier to control.