# freak out

> English word · Noun

## Definitions
1. A negative or unpleasant experience with LSD or another psychedelic drug.

## Etymology
From freak + out. Countercultural slang, originally referring to a positive reaction or experience from the use of a psychotropic, usually a hallucinogenic or psychedelic drug. First use appears c. 1966 in several newspapers, particularly in the Independent (Long Beach, California).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/freak-out