<Li> In the 1946 film Three Little Pirates, starring slapstick comedy group The Three Stooges, Moe offers to give a castle guard a Mickey Finn . </Li> <Li> In an episode of I Love Lucy, Fred recommends Ricky "slip (Lucy) a Mickey" as he does to Ethel when she's bothering him . </Li> <Li> In the 1976 Columbo episode "A Matter Of Honor" (episode 35), Columbo says, on examining a drugs cabinet: "Chloral hydrate? I'll tell you I don't know much about drugs but that's the stuff they put in a Mickey Finn . That's an American expression; knockout drops ." (end of the 56th minute) </Li> <Li> In Erykah Badu's song "Certainly" from the 1997 album Baduizm, she sings "You tried to get a little tricky, turned my back and then you slipped me a mickey ." </Li>

Where does the phrase slip a mickey come from