"朝秦暮楚"用英语怎么说?

“朝秦暮楚”,汉语成语字面意思是“serve(the State of)Qin in the morning and(the State of)Chu in the evening”。本指战国时期秦楚两个诸侯大国相互对立,经常作战。有的诸侯小国为了保证自身的利益与安全,时而倾向秦,时而倾向楚。现在比喻反复无常,可以翻译为“change one's loyalty frequently,be faithless”或“be quick to switch sides”。

例句

他岂是朝秦暮楚之辈!

He is certainly not the type who frequently switches sides.