What would happen if you were to set a cat loose among the pigeons? How do you think the birds would react? They would be pretty worried, wouldn’t they? The presence of the cat would create a great deal of disturbance. When you set a cat among the pigeons, you say or do something suddenly or unexpectedly. This often leaves the people worried or angry. It is also possible to say, “put the cat among the pigeons.”
*The principal set the cat among the pigeons when he informed the students that the annual day was likely to be cancelled.