越俎代庖

1. • 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
2. • to take matters into one's own hands

Character by character

• 越(yuè)generic word for peoples or states of south China or south Asia at different historical periods
• 俎(zǔ)a stand for food at sacrifice
• 代(dài)be a substitute for
• 庖(páo)kitchen