A term coined by Timothy Leary to describe the psychedelic experience. Leary explains it in his book Flashbacks as such

“Turn on’ meant go within to activate your neural and genetic equipment. Become sensitive to the many and various levels of consciousness and the specific triggers that engage them. Drugs were one way to accomplish this end. ‘Tune in’ meant interact harmoniously with the world around you – externalize, materialize, express your new internal perspectives. Drop out suggested an elective, selective, graceful process of detachment from involuntary or unconscious commitments. ‘Drop Out’ meant self-reliance, a discovery of one’s singularity, a commitment to mobility, choice, and change. Unhappily my explanations of this sequence of personal development were often misinterpreted to mean ‘Get stoned and abandon all constructive activity.”
"Like every great religion of the past we seek to find the divinity within and to express this revelation in a life of glorification and the worship of God. These ancient goals we define in the metaphor of the present — turn on, tune in, drop out." - Timothy Leary
by inner eye March 23, 2011
Get the turn on, tune in, drop out mug.