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Up in Arms

Up in Arms.

English
idiom

Very angry or outraged about something.

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What it means...

Very angry and ready to protest or fight back about something.

When people are up in arms, they are outraged and actively voicing their opposition.

It is often used to describe a group reaction to an unfair decision or change that affects them directly.

Use it when…

  • When employees react with outrage to a sudden and unpopular company policy
  • When residents strongly oppose a local government decision affecting their neighborhood
  • When a community or group publicly protests a decision they believe is unjust

Don’t confuse with...

Wrong icon

"Up in Smoke"

Something that has failed or been destroyed, especially plans or hopes

Wrong icon

"At Each Other's Throats"

Two people or groups actively fighting or arguing intensely with each other

Correct icon

"Up in Arms"

Being very angry and actively protesting against something

Where you’ll hear it

You’ll hear the "Up in Arms" idiom in real life — at work, in relationships, or in the media.

Work & Business

Corporate Issues

Staff are up in arms after the company announces it will cut bonuses and increase working hours.

Relationships & Social Life

Social Gatherings

Parents are up in arms over the school's decision to cancel the annual field trip program.

Media & Everyday Life

Politics

Citizens are up in arms after the government proposes a sharp increase in fuel taxes.

Use it like this

Here’s how to use "Up in Arms" idiom naturally in real conversations, with real examples.

Work & Business

Talking to Colleague

Colleague

Did you hear about the new remote work policy they announced this morning?

You

Yes — people are up in arms about it. Half the team is talking about leaving.

Relationships

Talking to Friend

Friend

They're tearing down the old community garden to build a car park.

You

People are going to be up in arms — that garden has been there for 30 years.

Everyday Conversations

Opinions

Friend

Why do you think people get so up in arms over these small policy changes?

You

Because it's often the small changes that signal bigger ones coming.

Last updated:
April 20, 2026

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