'fly the coop' definitions:

Definition of 'fly the coop'

From: WordNet
verb
Flee; take to one's heels; cut and run; "If you see this man, run!"; "The burglars escaped before the police showed up" [syn: scat, run, scarper, turn tail, lam, run away, hightail it, bunk, head for the hills, take to the woods, escape, fly the coop, break away]

Synonyms of 'fly the coop'

From: Moby Thesaurus