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birthday suit

bare skin; nakedness:
They were sunbathing in their birthday suits.
Origin of birthday suit
1745-55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for birthday suit
Historical Examples
  • birthday suit, the suit in which Adam and Eve first saw each other, and were not ashamed.

    The Slang Dictionary John Camden Hotten
  • He really looked as if Apollo had sent him a birthday suit, or a wedding-garment, and was witty and lively.

  • I had a fellow feeling for that Mazeppa party who was tied in his birthday suit to the back of a wild horse.

British Dictionary definitions for birthday suit

birthday suit

(informal, jocular) a state of total nakedness, as at birth
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 birthday suit

first attested 1730s, but probably much older. The notion is the suit of clothes one was born in, i.e., no clothes at all. Cf. Middle English mother naked "naked as the day one was born;" Middle Dutch moeder naect, German mutternackt.

Online Etymology Dictionary, © 2010 Douglas Harper
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birthday suit in Culture

birthday suit definition

To be “in one's birthday suit” is to be completely naked (as people are at birth).

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 definitions & phrases for birthday suit

birthday suit

noun phrase

What one is wearing when completely nude; the state of nakedness: Naked as a jaybird, with nothing on over his birthday suit (1730s+)

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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Idioms and Phrases with birthday suit

birthday suit

Nakedness, as in The doorbell rang, and here I was in my birthday suit. In 18th-century Britain this term originally referred to the clothes one wore on the king's birthday. Later it was jocularly transferred to bare skin, alluding to the condition of a newborn baby.
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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