Up in arms

Near-synonym: in the streets

The union members are up in arms over threats of pay cuts.

Lan[caster]. My lord, will you take armes against the king? Bish[op]. What neede I, God himselfe is vp in armes, When violence is offered to the church.

Allworthy was of a cooler Disposition than the good Woman, whose Spirits were all up in Arms in the Cause of her Friend.

Is file-sharing, which has the recording industry so up in arms, the “dark side” of open-source attitudes?

Many artists are up in arms about the new AI programs — and with good reason. Some are furious that their works have been used as training data without their permission.

March on, march on, ſince we are vp in Armes, If not to fight with forraine Enemies, Yet to beat downe theſe Rebels here at home.

News was brought him, that the Scythians, and barbarous nations of the North, were again up in arms, and invading the empire with furious impetuosity.