To get away or escape: “The Hendersons found the cocktail party rather dull and decided to fly the coop.”
To leave, esp to escape from confinement: He had flown the coop via a fire-escape/ Our Dubie done flew the coop (1910+)
: There were the cats, the milkmen, and the cops cooping in a police car at the corner
Related Termsfly the coop, hencoop, in the coop, rain cats and dogs
[police senses based on earlier coop, ''any shelter used by the police to avoid the elements''; fr chicken coop]