袍笏登场

páohù-dēngchǎng

[taking position of power, as in a dress rehearsal; dress up and go on stage-said of a puppet upon his take-over] 袍, 古代官服; 笏, 古代大臣上朝所执手板。 袍笏登场, 就是扮演大臣的演员登台演戏, 现在常用来比喻坏人上台, 有贬义; 或比喻新官上任, 有讽刺意

袍笏登场也等闲。 --清·赵翼《瓯北诗钞》