rule the roost
To be in charge, dominate

[TahlilGaran] Dictionary of Contemporary English ▲

rule the roost
to be the most powerful person who makes all the decisions in a group.
It was my mother who ruled the roost at home.

[TahlilGaran] English Idioms Dictionary ▲

rule the roost
to be the boss or manager somewhere but often at home (a roost is a place where birds can perch/sit); to be the dominant figure in a family
My grandfather ruled the roost in his family.

The woman seems rather quiet but she rules the roost in her family.

[TahlilGaran] English Idioms Dictionary ▲

rule the roost
v. phr., informal To be leader or boss; be in charge.
Jim is very bossy; he always wants to rule the roost.
Who rules the roost in the Smith's house?
Compare: WEAR THE TROUSERS.

[TahlilGaran] English Idioms Dictionary ▲