# one's blood is up

idiom

Source: https://englishreference.com/idiom/ones-blood-is-up
Updated: 2026-08-10

## Meaning

One is very angry.

## Examples

- His blood is up because you broke his favorite chair.
- After the manager insulted her work in front of the team, her blood was up and she demanded an apology.
- The politician’s blood was up as he listened to the false accusations, and he struggled to maintain his composure before the cameras.

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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.