put/set the cat among the pigeons

US /pʊt/sɛt ðə kæt əˈmʌŋ ðə ˈpɪdʒɪnz/
UK /pʊt/sɛt ðə kæt əˈmʌŋ ðə ˈpɪdʒɪnz/
"put/set the cat among the pigeons" picture
1.

大騒ぎを引き起こす, 混乱を招く

to say or do something that causes trouble or makes a lot of people angry or worried

:
His controversial remarks really put the cat among the pigeons at the meeting.
彼の物議を醸す発言は、会議で本当に大騒ぎを引き起こした
Announcing the new policy will certainly set the cat among the pigeons.
新しい政策を発表することは、間違いなく大騒ぎを引き起こすだろう。