a Of, containing, generating, or reminiscent of drug-induced hallucinations, distortions of perception, altered awareness etc.
a (context|of graphics, etc.) Having bright colours, abstract shapes, etc. reminiscent of drug-induced hallucinations or distortions of perception.
n Any psychoactive substance (such as LSD or psilocybin) which, when consume|consumed, causes perception|perceptual changes (sometimes erratic and uncontrollable), visual hallucination, and altered awareness of the body and mind.