Fly the coop


[koop, koop]
an enclosure, cage, or pen, usually with bars or wires, in which fowls or other small animals are confined for fattening, transportation, etc.
any small or narrow place.
Slang. a prison.
Sometimes Facetious. a cooperative, especially the cooperative bookstore of a college or university.
verb (used with object)
to place in or as if in a coop; confine narrowly (often followed by up or in ).
verb (used without object)
Slang. (of a police officer) to park and sleep inside one's patrol car while on duty.
fly the coop, Informal. to run off; depart abruptly; escape: We stopped to see my sister, but she'd flown the coop.

1250–1300; Middle English coupe basket, perhaps < Scandinavian; compare Norwegian kaup wooden can; akin to Old English cȳpa basket

uncoop, verb (used with object)

co-op, coop, co-opt, coupe. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
coop1 (kuːp)
1.  a cage or small enclosure for poultry or small animals
2.  a small narrow place of confinement, esp a prison cell
3.  a wicker basket for catching fish
4.  (tr; often foll by up or in) to confine in a restricted area
[C15: probably from Middle Low German kūpe basket, tub; related to Latin cūpa cask, vat]

coop or co-op2 (ˈkəʊˌɒp)
a cooperative, cooperative society, or shop run by a cooperative society
co-op or co-op2

the internet domain name for
a cooperative

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. cype, cypa "basket, cask," akin to M.Du. kupe, probably from L. cupa "tub, cask," from PIE *keup- "hollow mound." The verb is attested from 1560s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary

fly the coop definition

To get away or escape: “The Hendersons found the cocktail party rather dull and decided to fly the coop.”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Slang Dictionary

fly the coop definition

  1. tv.
    to escape from somewhere; to get away. : I was afraid he would fly the coop if I didn't tie him up.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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American Heritage
Abbreviations & Acronyms
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage
Idioms & Phrases

fly the coop

Escape, run away, as in After years of fighting with my mother, my father finally flew the coop. This term originally meant "escape from jail," known as the coop in underworld slang since the late 1700s. [Late 1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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