Welche Bedeutung steckt hinter der hier vorgestellten Vokabel aus dem Bereich Office gossip?

'The whole department is up in arms because we only found out on the news that we are getting a new managing director.' 'Really? Then I think your corporate communication policy needs to be improved.'

to be up in arms

Do you know what it means?

• to be confused
• to be very angry
• to be at home