Definition

Noun: A very foolish or stupid person. This term is an informal and derogatory word used to insult someone's intelligence.

Usage

This word is a strong pejorative (insulting term). It is used to directly call someone stupid or to describe them as such. It is considered rude and impolite.

Examples

• He's a complete muttonhead for trying to fix the wiring himself.
• Don't be such a muttonhead—look where you're going!
• I felt like a real muttonhead after forgetting my own phone number.

Advanced Usage / Nuances

• The term often implies a specific kind of stupidity: a dull, slow-witted, or obstinate foolishness, rather than a momentary lapse in judgment.
• It is more common in British English than American English but is understood in both.
• Due to its offensive nature, it is typically used in informal contexts, such as in arguments, among friends (often jokingly), or in fictional dialogue to characterize someone.

Variants and Related Words

• Mutton-headed (adjective): Having the qualities of a muttonhead; stupid.
  • That was a mutton-headed thing to do.

Synonyms

• Idiot
• Fool
• Blockhead
• Dunce
• Numskull / Numbskull
• Dolt

Idioms / Fixed Phrases

• No specific idioms use "muttonhead" as a core component. It is itself a standalone insult.

Noun

1. a stupid person; these words are used to express a low opinion of someone's intelligence