Definition
To have someone completely under your control, able to manipulate them into doing anything you desire.
將某人掌握在手心，完全控制。
The politician was a skilled speaker; he had the crowd in the palm of his hand.
這位政治家是個演講高手；他把群眾牢牢掌握在手中。
She knew how to manipulate her boss; she always had him in the palm of her hand.
她知道如何操控她的老闆；她總是能把他牢牢掌握在手中。
After years of training, the magician could easily have the audience in the palm of his hand.
經過多年的訓練，這位魔術師可以輕易地將觀眾牢牢掌握在手中。