A series of parties and gatherings consisting of high use of grass, speed, and most especially LSD. These gatherings were common in the mid to late 60's created by novelist Ken Kesey and his Band of Merry Pranksters. The band The Grateful Dead, was conceived at these acid tests.
Can you pass the acid test?
by cameronwiggins October 19, 2005
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a very thourough test(acid is used in the chemical test to determine if gold is real or not)
I gave my new car an acid test to determine if it was worth buying.
by Light Joker April 3, 2005
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'Can you pass the acid test?'

Simply answer yes or no. The basis of the meta-experiment is whether or not you are able to put yourself up to something without asking a follow question.
Tester: 'Can you pass the acid test?'

Testee: 'I am not sure, probably'

Audience: 'Nice'
by Doctor Octer April 12, 2018
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A technique wherein a person subjects a potential friend to a series of mean or horrific tests to see if the person is actually cool.
Potential Friend: Hi man, what's up?
Cool Guy: Go fuck yourself.
Potential Friend: Fuck you too, buddy. Wanna go grab a burger?
Cool Guy: Congrats, you passed the acid test.

Potential Friend: Hi man, what's up?
Cool Guy: Go fuck youself.
Potential Friend: *cry*
by sk1tch March 8, 2007
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Tom Wolfe wrote The Electric Kool-Aid Acid Test about Ken Kesey, a promising young writer, during Kesey's experimentations with LSD from about 1961 to 1964.

Kesey bought property in La Honda and moved his wife and children and assorted Merry Pranksters to the mountains outside of San Francisco. There they began throwing parties Kesey called Acid Tests, where revelers would ingest LSD, sometimes without their knowledge, and attempt to survive the often harrowing night. Kesey believed that one's personal fears should be confronted under the influence of hallucinogenic drugs.

Musical performances by the Grateful Dead were commonplace, along with black lights, strobe lights, and day-glo paint. Kesey constantly pushed the limits with his own experimentations and eventually moved the Acid Tests into public places such as the Longshoreman's Hall, Muir Beach, or musical events at Bill Graham's Fillmore West. The Acid Tests are notable for their influence on the LSD-based counterculture of the San Francisco area and subsequent transition from the beat generation to the hippie movement.

A film adaptation of the book is in development for a 2011 release. It will be directed by Gus Van Sant. So far, no casting decisions have been announced, but both Woody Harrelson and Jack Black are being considered to star as Kesey.
"His hair has the long jesuschrist look. He is wearing the costume clothes. But most of all, he now has a very tolerant and therefore withering attitude toward all those who are still struggling in the old activist political ways . . . while he, with the help of psychedelic chemicals, is exploring the infinite regions of human consciousness. "
The Electric Kool-Aid Acid Test (1968)
by Tomatis April 6, 2010
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