knockout drops

plural noun

1. chloral hydrate or any similar rapidly acting drug, especially one put in a drink secretly to make the drinker unconscious.

knockout drops

plural noun

1. slang.
   a drug secretly put into someone's drink to cause stupefaction See also Mickey Finn

Word History and Origins

Origin of knockout drops¹

First recorded in 1890–95

Example Sentences

But Frank Brooks wasn't full of knockout drops this time, and with a clear head he was no pushover.

From Project Gutenberg

Often by knockout drops he is reduced to insensibility and robbed.

From Project Gutenberg

I hope you don't want an innocent child of that age to know about knockout drops!

From Project Gutenberg

On the sidewalk I tried to figure out if there had been knockout drops in the coffee Natica had brewed for me.

From Project Gutenberg

He never saw a bludgeon in his life; and he scorned knockout drops.

From Project Gutenberg