Up in arms
Meaning
To be very angry and protesting strongly about something.
Origin
The phrase "up in arms" emerged in the 16th century, a time when social unrest and skirmishes were common. It literally described citizens or soldiers seizing their weapons—swords, pikes, or muskets—and preparing for battle or rebellion. To be "up in arms" meant one was not just discontent, but actively mobilising, ready for a physical confrontation against an oppressive force or invading enemy. This vivid image of people brandishing weapons in defiance gradually evolved, shedding its literal military context to become a powerful metaphor for widespread anger and vocal protest, where words are now the primary weapons.
Examples
- The residents were up in arms over the council's decision to close the local park without public consultation.
- After the unpopular new policy was announced, employees were up in arms, demanding an immediate meeting with management.