from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To depart hastily or unannounced; to escape or flee.
- v. To escape from a pen or similar enclosure.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. flee; take to one's heels; cut and run
From fly, to flee or run away, + coop, an enclosure for birds. (Wiktionary)