rule the roost
US /ruːl ðə ruːst/
UK /ruːl ðə ruːst/
1.
當家作主, 掌權
to be in charge, to be the dominant person or group in a situation
:
•
In their household, it's clear that the grandmother rules the roost.
在他們家裡，很明顯是奶奶當家作主。
•
The new manager quickly established himself and now rules the roost in the department.
新經理很快站穩了腳跟，現在在部門裡當家作主。