psychedelic
adjective
°Of, containing or generating hallucinations, distortions of perception, altered awareness etc.
noun
°Any psychoactive substance (such as LSD or psilocybin) which, when consumed, causes perceptual changes (sometimes erratic and uncontrollable), visual hallucination, and altered awareness of the body and mind.
interjection
°(1960s hippy slang) awesome, cool, groovy.