越俎代庖

yuè zǔ dài páo

ㄩㄝˋ ㄗㄨˇ ㄉㄞˋ ㄆㄠˊ

Idiom

1to take matters into one's own hands

2lit. 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