"Drinking the Kool-Aid" is most strongly believing in and accepting a deadly, deranged, or foolish ideology or concept based only upon the overpowering coaxing of another; the expression is also used to refer to a person who wrongly has faith in a possibly doomed or dangerous idea because of perceived potential high rewards. The phrase typically carries a negative connotation. It can also be used ironically or humorously to refer to accepting an idea or changing a preference due to popularity, peer pressure, or persuasion. In recent years, it has evolved further to mean extreme dedication to a cause or purpose, so extreme that one would "drink the Kool-Aid" and die for the cause.
While use of the phrase dates back to 1968 with the nonfiction book The Electric Kool-Aid Acid Test,[citation needed] it is strongly associated with the events in Jonestown, Guyana, on November 18, 1978, in which over 900 members of the Peoples Temple movement died. The movement's leader, Jim Jones, called a mass meeting at the Jonestown pavilion after the murder of U.S. Congressman Leo Ryan and others in nearby Port Kaituma. Jones proposed "revolutionary suicide" by way of ingesting a powdered drink mix made from Flavor Aid (later misidentified as Kool-Aid) that was lethally laced with cyanide and other drugs.[1][2]