Mickey Finn

A Mickey Finn is a slang term for a drink laced with a drug (especially chloral hydrate) given to someone without their knowledge in order to incapacitate them. Serving someone a Mickey Finn is most commonly referred to as slipping a mickey.

The Mickey Finn is most likely named for the manager and bartender of a Chicago establishment, the Lone Star Saloon and Palm Garden Restaurant, which operated from 1896 to 1903 in the city's South Loop neighborhood on South State Street. In December 1903, several Chicago newspapers document that a Michael "Mickey" Finn managed the Lone Star Saloon and was accused of using knockout drops to incapacitate and rob some of his customers. Moreover, the first known written example of the use of the term Mickey Finn is in 1915, twelve years after his trial, lending credence to this theory of the origination of the phrase.

Before his days as a saloon proprietor, Mickey Finn was known as a pickpocket and thief who often preyed on drunken bar patrons. The act of serving a Mickey Finn Special was a coordinated robbery orchestrated by Finn. First, Finn or one of his employees, which included "house girls", would slip a drug (chloral hydrate) in the unsuspecting patron's drink. The incapacitated patron would be escorted or carried into a back room by one of Finn's associates who would then rob the victim and dump him in an alley. Upon awaking the next morning in a nearby alley, the victim would remember little or nothing of what had happened. Finn's saloon was ordered closed on December 16, 1903.

In 1918, Mickey Finn was apparently arrested again, this time for running an illegal bar in South Chicago.

As a plot device, Mickey Finning first appears in the 1930 film Hold Everything and the 1930 novel The Maltese Falcon. Since that time it has been used many times in books, film, television, often occurring in detective stories and comedy scenes.