1 [fed]
simple past tense and past participle of feed.
fed up, impatient; disgusted; bored: They were fed up with the same old routine.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
fed1 (fɛd)
1.  the past tense and past participle of feed
2.  informal fed to death, fed to the teeth, fed up to the teeth, fed to the back teeth, fed up to the back teeth bored or annoyed

fed2 (fɛd)
slang (US) an agent of the FBI

Fed (fɛd)
informal (US) the Fed the Federal Reserve Bank or Federal Reserve Board

fed up
informal (usually postpositive) annoyed, discontented, or bored: I'm fed up with your conduct

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

fed up
see feed (v.).

1788, short for Federalist; as colloquial for official of the federal government, from 1916, especially, after 1930s, of FBI agents.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Abbreviations & Acronyms
federal agent
Federal Reserve System
  1. field emission device

  2. field-emitting diode

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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Example sentences
He is so bad now that one of the other dogs has now started to nip him as she's
  fed up with him as well.
Fear is a powerful inducer but after awhile, when the monster doesn't show up
  at the door, the public gets fed up and turns away.
Whenever people get fed up with war, it reverberates back.
Fed up with the bureaucracy, he simply instructed his staff to take them out,
  adding precious workspace.
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