The story
From head + shop. First use appears c. 1966 in the defunct periodical East Village Other.
Etymology from Wiktionary, CC BY-SA 4.0.
head shop
Today it means: A retail outlet specializing in sale of paraphernalia related to consumption of cannabis, other recreational drugs, and New Age herbs, as well as generally selling counterculture art, magazines, music, clothing, and home decor. Full definition →