put/set the cat among the pigeons
US /pʊt/sɛt ðə kæt əˈmʌŋ ðə ˈpɪdʒɪnz/
UK /pʊt/sɛt ðə kæt əˈmʌŋ ðə ˈpɪdʒɪnz/

1.
引起軒然大波, 惹麻煩
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.
他那些有爭議的言論真是在會議上引起了軒然大波。
•
Announcing the new policy will certainly set the cat among the pigeons.
宣布這項新政策肯定會引起軒然大波。