Acidhead means: A person who uses the hallucinogenic drug LSD.. It is informal slang, fine in casual speech but not suited to formal contexts. It has drug-related associations; worth a calm conversation about which side of the topic your teen is on. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
acidhead
(slang, often, pejorative) A person who uses the hallucinogenic drug LSD.
ˈæsɪhˌdɛdDocumented since 1960s1960sGen Xhistorical186 viewsLast reviewed Jun 29, 2026＋ Add a definition
Etymology timeline
Born ~1965 · no dated citations yetBoomer / counterculture eraSee decade cohort →
Definitions
Global
#1·Apr 26, 2026Global
(slang, often, pejorative) A person who uses the hallucinogenic drug LSD.
For parents
Acidhead means: A person who uses the hallucinogenic drug LSD.. It is informal slang, fine in casual speech but not suited to formal contexts. It has drug-related associations; worth a calm conversation about which side of the topic your teen is on. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
For ESL learners
acidhead means: A person who uses the hallucinogenic drug LSD.. Register: very informal, often derogatory or vulgar. Avoid in formal, business, academic, or polite writing. Even in casual speech the word can offend and is best left out of a learner's active vocabulary. Common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; always check the context before producing it yourself.
Cluster: hallucinogens
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For specific readers
Why is this section here?
Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.
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??About Drugs & Substances slang
Slang for cannabis, opioids, stimulants, psychedelics, alcohol, prescription drugs, and rave/club culture.
See all Drugs & Substances slang on Slangora.
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Other words near "acidhead" (A)
achariachievement whoreacidacid codedacid coreacid energyacid maxxingacid modeacid pilledack-ackack emmaackempucky
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Semantically related
- drughead75%
(slang) A drug addict.
- drop acid72%
(slang) to take LSD.
- E-head72%
(slang) A recreational user of the drug MDMA or ecstasy.
- drughead72%
A drughead is a blunt, informal label for someone who uses drugs habitually — the kind of person whose life orbits around their next fix. It carries a dismissive, judgmental edge and is rarely used with compassion; it's more of a street-level insult than a clinical description. The term gets deployed to write someone off rather than understand them, and it's fallen somewhat out of fashion as conversations about addiction have shifted toward more empathetic framing.
- hophead71%
(US, slang) A drug addict.