Drink the Kool Aid
Meaning
Accept a belief or plan unquestioningly, often to the point of self harm.
Usage
Used as a warning against cultish or blind loyalty.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Refers to the 1978 Jonestown tragedy, in which more than 900 people died after drinking a poisoned flavoured drink (reportedly Flavor Aid rather than Kool-Aid). Use with care.
Entered English after 1978.