- arsonist; incendiary; pyromaniac.
Origin of firebug
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for firebug
You know they're after the firebug, an' you better watch out!The Girl Scouts at Sea Crest
And in all these fires the firebug had neither been seen nor traced.
One more thing; if the fire had been set, was the firebug still about the place?
Johnny told of his new task and of his hopes of capturing the firebug.
That firebug has burned school houses, a recreation center, the zoo.
- 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
Word Origin and History for firebug
Online Etymology Dictionary, © 2010 Douglas Harper