acid-head

or ac·id·head

[ as-id-hed ]
/ ˈæs ɪdˌhɛd /

noun Slang.

a person who habitually takes the drug LSD.

Origin of acid-head

First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for acidhead

acidhead

/ (ˈæsɪdˌhɛd) /

noun

slang a person who uses LSD
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012