Etymology

acidhead

A1C3I1D2H4E1A1D2

Today it means: A person who uses the hallucinogenic drug LSD. Full definition →

English acid ← French acide ← Latin acidu
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The story

  1. Latinacidu
  2. Frenchacide
  3. Englishacid
  4. English todayacidhead

From acid (“LSD”) + -head.

Etymology from Wiktionary, CC BY-SA 4.0.