up in arms

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English[edit]

Adjective[edit]

up in arms (not comparable)

  1. (idiomatic) Angry; incensed; preparing for a fight.
    The union members are up in arms over threats of pay cuts.

Usage notes[edit]

  • "All" may be added as an intensifier at the beginning of the expression, as in:
Her father was all up in arms when we returned late at night.