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Adjective: up in arms
Usage: informal
  1. Angry; preparing or planning for a fight

Encyclopedia: Up in arms

Nearest

unyieldingness
unyoke
unzip
up
up against it
up and down
up for
up for grabs
up front
up here
up in arms
up in the air
up on
up quark
up shit creek
up sticks
up the ante
up the creek
up the duff
up the spout
up the stairs