# mouth breather

idiom

Source: https://englishreference.com/idiom/mouth-breather
Updated: 2026-08-10

## Meaning

A person who is boorish, stupid, or otherwise unattractive.

## Examples

- Don't listen to that mouth breather.
- I cannot believe I have to work with such a mouth breather on this important project.
- The manager dismissed the critic as a mere mouth breather, ignoring the valid points raised in his review.

---

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.