I. roost 1 /ruːst/ BrE AmE noun [countable]
[ Language: Old English ; Origin: hrost ]
a place where birds rest and sleep
⇨ rule the roost at ↑ rule 2 (4)
II. roost 2 BrE AmE verb [intransitive]
1 . if a bird roosts, it rests or sleeps somewhere
2 . sb’s chickens come home to roost ( also something comes home to roost ) used to say that someone’s past mistakes are causing problems for them now:
After years of overspending, the chickens have come home to roost.