bun

bun

1 [buhn]
noun
1.
any of a wide variety of variously shaped bread rolls, usually leavened and slightly sweetened or plain, sometimes containing spices, dried currants, etc.
2.
hair gathered into a round coil or knot at the nape of the neck or on top of the head in certain coiffures.
3.
buns, Slang. the buttocks.

Origin:
1325–75; Middle English bunne, of obscure origin

Dictionary.com Unabridged

bun

2 [buhn]
Idioms
have a bun on, Slang. to be intoxicated: Everyone at the party seemed to have a bun on.

Origin:
1900–05; of uncertain origin

BUN

blood urea nitrogen: the concentration of nitrogen in the blood in the form of urea, indicating kidney function.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
bun (bʌn)
 
n
1.  a small roll, similar to bread but usually containing sweetening, currants, spices, etc
2.  any of various types of small round sweet cakes
3.  a hairstyle in which long hair is gathered into a bun shape at the back of the head
4.  slang have a bun in the oven to be pregnant
 
[C14: of unknown origin]

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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Etymonline
Word Origin & History

bun
late 14c., origin obscure, perhaps from O.Fr. buignete "a fritter," originally "boil, swelling," dim. of buigne "swelling from a blow, bump on the head," from a Gmc. source (cf. M.H.G. bunge "clod, lump"), or from Gaul. *bunia (cf. Gael. bonnach). Of hair coiled at the back of the head, first attested
1894. The first record of buns in the sense of "male buttocks" is from 1960s; but the singular form meant "tail of a hare" (1530s) in Scottish and northern England dialect and was transferred to human beings (and conveniently rhymed with nun in ribald ballads). This may be an entirely different word.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

BUN abbr.
blood urea nitrogen

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Abbreviations & Acronyms
BUN
blood urea nitrogen
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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