A Mickey Finn (or simply Mickey) 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 practice is most likely named for the bartender of a Chicago establishment, the Lone Star Saloon and Palm Garden Restaurant.
In December 1903, several 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 (according to the Oxford English Dictionary) 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.
The Daily Omnivore 
Leave a Reply