ㄑㄧㄠㄅㄧㄢㄍㄨˇqiāobiāngǔ

敲边鼓
  1. 旁邊比喻幫腔助長聲勢打邊鼓」、打獵鼓」。 口才上場敲邊鼓」。

to back sb up, to support sb in an argument, (lit. to beat nearby drum)​