Wiktionary
flown the nest
vb. (past participle of fly the nest English)
Usage examples of "flown the nest".
Perhaps, Damon thought, he had to maintain his sense of purpose at a high pitch lest he lose it completely-as Silas seemed to have lost his once Damon had flown the nest.
She had been becoming progressively more ill-tempered as the day wore on, and finding that their last known link between Arkos and the Continuum Void manager had flown the nest had apparently been the last click.