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[fahyuh r-buhg] /ˈfaɪərˌbʌg/
noun, Informal.
arsonist; incendiary; pyromaniac.
1870-75, Americanism; fire + bug1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for firebug
  • Or it could have been a drooling firebug looking for a safe corner to set a fire.
  • He bore a shadowed name as a firebug, having burned three buildings for insurance.
British Dictionary definitions for firebug


(informal) a person who deliberately sets fire to property
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 firebug

"arsonist," 1872, from fire (n.) + bug (n.).

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



An arsonist; pyromaniac

[1872+; fr fire plus bug, ''maniac'']

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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Encyclopedia Article for firebug

a species of insect in the stinkbug family, Pentatomidae (order Heteroptera), that sucks sap and chlorophyll from crops, such as cabbage, causing them to wilt and die. Though of tropical or subtropical origin, this insect now ranges from the Atlantic Ocean to the Pacific Ocean in North America. The harlequin cabbage bug is shield-shaped, about 1.25 centimetres (0.5 inch) long, and brilliantly coloured with red, yellow, and black. Fifty to 60 adult harlequin bugs may be found feeding simultaneously on one large plant, and both adult and immature bugs are often found together.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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