Noun
someone who takes LSD
Source: WordNetI was raised a Christian and was a stone-faced acid head. Ken Kesey
Yes, but personally I was never a big acid head. Bill Griffith
The underground press was convinced that I was a junkie, an acid head. ... But I don't do drugs. I don't like being fucked up. I've got enough bizarre chemicals floating around in my head. I'm just naturally like this. Terry Gilliam