roost (roosts plural & 3rd person present) (roosting present participle) (roosted past tense & past participle )
1 n-count A roost is a place where birds or bats rest or sleep.
2 verb When birds or bats roost somewhere, they rest or sleep there.
The peacocks roost in nearby shrubs. V prep/adv
3 If bad or wrong things that someone has done in the past have come home to roost, or if their chickens have come home to roost, they are now experiencing the unpleasant effects of these actions.
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come home to roost/chickens come home to roost phrase
Appeasement has come home to roost...
4 If you say that someone rules the roost in a particular place, you mean that they have control and authority over the people there.
INFORMAL
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rule the roost phrase
Today the country's nationalists rule the roost and hand out the jobs.