a brand name for a powdered mix used to make a sugary, fruit-flavored drink.
noun
a drink made from this mix.
Idioms for Kool-Aid
drink the Kool-Aid, to support or believe in something in a blindly enthusiastic way: A level-headed reporter, he didn’t drink the Kool-Aid on the tax issue.
Origin of Kool-Aid
def. 3 in reference to the 1978 Jonestown Massacre, in which a cult leader supposedly convinced followers to drink a poisoned beverage