# dumbass

CEFR B2 · Noun

Source: https://englishreference.com/word/dumbass
Updated: 2026-05-10

## Definition

a person who is very stupid or does something very foolish.

For teachers: a person who acts in a stupid or foolish manner. Vulgar in register; highly offensive when used as an insult.

## Examples

- Don't be such a dumbass.
- He felt like a total dumbass after realizing he had left his keys inside the locked car.
- The manager called him a dumbass behind his back, though he quickly regretted the unprofessional outburst during the meeting.

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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.