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muttonhead

A muttonhead is a thoroughly dim-witted person — someone whose thinking is about as sharp as the wool on a sheep's back.

ˈmʌtənˌheɪdDocumented since 1800shistorical60 viewsLast reviewed Jun 29, 2026+ Add a definition
🇬🇧 British & Irish slang
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Born ~1800 · no dated citations yet
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UK
#1·Apr 28, 2026UK

A muttonhead is a thoroughly dim-witted person — someone whose thinking is about as sharp as the wool on a sheep's back. This old British insult compares the target to a mutton (adult sheep), traditionally associated with dullness and docility. It's the 19th-century equivalent of calling someone a blockhead or a numbskull, and while it sounds quaint today, it lands with satisfying bluntness in the right company.

Some muttonhead at the council approved a roundabout that only makes traffic worse.
Origin: British slang dating to at least the early 1800s, comparing a fool's mental capacity to a sheep — an animal long used as a symbol of dumb conformity. Editorial expansion authored on Slangora.
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UK
#2·Apr 27, 2026UK

(British, slang) A stupid or foolish person.

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🇬🇧About British & Irish slang slang

UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.

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