拿手好戏

1. the play that an actor does best

♦ 《贵妃醉酒》是她的~。 The Drunken Beauty was the play she did best.

2. one's speciality; one's forte

♦ 游泳是她的~。 Swimming is her forte.

♦ 挑拨离间是他的~。 He makes a speciality of sowing discord. or He is a past master at sowing discord.