lit. to be the meat on sb's chopping block (idiom); fig. to be at sb's mercy
越俎代庖越俎代庖yue4 zu3 dai4 pao2
lit. to go beyond the sacrificial altar and take over the kitchen (idiom); fig. to exceed one's place and meddle in other people's affairs; to take matters into one's own hands
折冲樽俎折衝樽俎zhe2 chong1 zun1 zu3
lit. to stop the enemy at the banquet table; fig. to get the better of an enemy during diplomatic functions