slip someone a Mickey
slip (one) a Mickey (Finn)
To put a drug in someone's drink that will make them lose consciousness and incapacitate them; to serve someone a drink laced with such a drug. Please be careful—it's scarily easy for someone to slip you a Mickey at big parties like that. The victim of the robbery stated that the assailant had slipped him a Mickey Finn at the bar.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
slip someone a Mickey
tv. to secretly put a Mickey Finn in someone’s alcoholic drink. (This drug either makes the victim pass out or causes immediate diarrhea.) Somebody slipped Marlowe a Mickey and sent him into action.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.