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[frat] /fræt/
noun, Informal.
fraternity (def 1).
Origin of frat
An Americanism dating back to 1890-95; by shortening Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for frat
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Historical Examples
  • "It has nothing to do with the secret proceedings of your 'frat'," said Dora, primly.

    Ramsey Milholland Booth Tarkington
  • The too fatherly "frat seniors" did all that Fred said they would, and more.

    Ramsey Milholland Booth Tarkington
  • Of course we all loved Ole madly, but for all that he didn't make a frat.

    At Good Old Siwash George Fitch
  • We put on a little more gasoline and started for the frat house.

    At Good Old Siwash George Fitch
  • But one must stand by one's frat, you know—Gee, how proud I felt when I said that!

    At Good Old Siwash George Fitch
British Dictionary definitions for frat


(US, slang)
  1. a member of a fraternity
  2. (as modifier): the frat kid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for frat

student slang shortening of fraternity, by 1888.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for frat



  1. A college fraternity (1895+ College students)
  2. (also frat rat) A fraternity member (1895+ College students)
  3. A male student who conforms to middle-class norms of conduct and dress: A ''frat'' is a youth who dresses neatly and conforms to the accepted patterns (1960s+ Teenagers)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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