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coop

1 coop /ˈkuːp/ noun
plural coops
1 coop
/ˈkuːp/
noun
plural coops
Britannica Dictionary definition of COOP
[count]
: a cage or small building in which chickens or other small animals are kept

fly the coop

see 1fly
2 coop /ˈkuːp/ verb
coops; cooped; cooping
2 coop
/ˈkuːp/
verb
coops; cooped; cooping
Britannica Dictionary definition of COOP

coop up

[phrasal verb]
coop up (someone or something) or coop (someone or something) up
: to keep (a person or animal) inside a building or in a small space especially for a long period of time usually used as (be) cooped up