What does alco mean?
Alco is an informal noun meaning a person who is addicted to alcohol — essentially a shortened form of 'alcoholic'. The term is found mainly in British, Australian, and New Zealand English, where colloquial shorthand for heavy drinkers has long flourished alongside cousins like 'boozer' and 'drunk'. In tone, 'alco' is casual and often jocular, the kind of word used in banter at the pub or in reminiscence about a hard-drinking acquaintance. That very casualness gives it a cautionary edge: because alcoholism is a serious medical condition, using 'alco' in formal writing, healthcare settings, or sensitive conversation can come across as flippant or stigmatising, and standard terms such as 'alcoholic' are preferred there. The word is easily understood precisely because its full form is so familiar — listeners instantly supply the missing syllables. For readers of contemporary fiction, memoir, or journalism set in Britain or Australasia, recognising 'alco' helps decode dialogue that trades on working-class idiom and dark humour, while also serving as a reminder of how language both names and softens addiction.
nounAn informal, chiefly British and Australasian term for a person who is addicted to alcohol; an alcoholic.
- A person who is dependent on or addicted to alcohol (informal).
"He'd been an alco for years before he finally checked into rehab."
"Everyone knew the pub's regulars, and everyone knew old Tom was the resident alco."
"After his third DUI, even his mates stopped calling him a bit of an alco and started calling it what it was."
Pluralises regularly; rare outside informal speech.
"The novel peopled its dockside tavern with a colourful cast of alcos."
The slangy 'alco' is just 'alcoholic' with its tail clipped — proof that English speakers will abbreviate almost anything.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of alco
Alco is a straightforward colloquial clipping of 'alcoholic', itself derived from 'alcohol'. The word 'alcohol' entered European languages through Arabic — al-kuḥl originally referred to powdered antimony used as eye cosmetic, and the term was gradually extended in alchemy and early chemistry to distilled spirits. The clipped slang form arose in twentieth-century British and Australasian speech, part of a broader habit of truncating longer words into punchy informal nouns.
How alco is actually used
Informal and somewhat dated; it can sound flippant or dismissive about alcoholism, so it is best avoided in serious or medical discussion, where 'alcoholic' or 'person with alcohol use disorder' is preferred.
Easily confused with alco
'Alco' is simply an informal shortening of 'alcoholic', which is the standard term used in medical and formal contexts.