<P> The Mickey Finn is most likely named after the manager and bartender of the Lone Star Saloon and Palm Garden Restaurant , which operated in Chicago from 1896 to 1903 , on South State Street in the Chicago Loop neighborhood . 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 term , according to the Oxford English Dictionary ( OED ) , is in 1915 , which was 12 years after his trial and lends credence to this theory . </P>
where did the term slip a mickey come from
most likely named after the manager and bartender of the Lone Star Saloon and Palm Garden Restaurant