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boo

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boo

1[boo] interjection, noun, plural boos, verb, booed, boo⋅ing.
–interjection
1. (used to express contempt or disapprobation or to startle or frighten).
–noun
2. an exclamation of contempt or disapproval: a loud boo from the bleachers.
–verb (used without object)
3. to cry boo in derision.
–verb (used with object)
4. to show disapproval of by booing.

Origin:
1810–20; expressive formation

boo

2[boo, boh]
–noun
Slang. marijuana.
Also called boo grass.


Origin:
1955–60; of uncert. orig.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To boo
boo 1   (bōō)   
n.   pl. boos
  1. A sound uttered to show contempt, scorn, or disapproval.

  2. Informal Any sound or word: You never said boo to me about overtime.

interj.  Used to express contempt, scorn, or disapproval or to frighten or surprise another.
v.   booed, boo·ing, boos

v.   intr.
To utter a boo.
v.   tr.
To express contempt, scorn, or disapproval of by booing: booed the singer off the stage.

[Imitative.]
boo 2   (bōō)   
n.   Slang
Marijuana.

[Origin unknown.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

boo 
"to startle," c.1430, probably because it can be pronounced as a loud, booming sound; as an expression of disapproval, 1816, perhaps imitative of oxen; hence, the verb meaning "shower someone with boos" (1893). Boo-hoo first recorded 1525, originally of laughter or weeping. To say boo "open one's mouth, speak," originally was to say boo to a goose.
Online Etymology Dictionary, © 2001 Douglas Harper
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Abbreviations & Acronyms
BOO
Bootes (constellation)
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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