# pinhead

/ˈpɪnˌhɛd/ (US) · /pˈɪnhɛd/ (UK) · CEFR C2 · Noun

Source: https://englishreference.com/word/pinhead
Updated: 2026-10-07

## Definition

the very small, flat top of a pin. It is also a rude name for someone you think is very stupid or behaves in a silly way.

For teachers: the flattened head of a pin; figuratively, a person perceived as exceptionally foolish or dim-witted. Often used as a derogatory epithet in informal contexts.

## Examples

- He is such a pinhead for forgetting his keys again.
- The tailor struggled to pick up the tiny pinhead from the thick carpet.
- Philosophers once debated how many angels could dance on a pinhead, a question now used to mock useless academic hair-splitting.

## Synonyms

idiot, fool, dummy, dope, nitwit

## Antonyms

genius

## Usage notes

- Informal and insulting when applied to a person.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.