One who practices butthole surfing - the act of intravenously
injecting an aqueous solution
of both LSD and heroin (or another interchangably potent opioid analgesic). The author strongly discourages this
kind of behavior, being considerably more risky
than IV self-administration of either compound independently, which is saying alot.
The name was of course also
adopted by the well known
Texan acid-punk band the Butthole Surfers.