firebug

/ˌfaɪərˈbʌg/
IPA guide

Other forms: firebugs

Definitions of firebug
  1. noun
    a true bug: brightly colored bug that can exude a stain
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    type of:
    heteropterous insect
    true bugs: insects whose forewings are membranous but have leathery tips
  2. noun
    a criminal who illegally sets fire to property
    synonyms: arsonist, incendiary
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    types:
    barnburner
    someone who burns down a barn
    type of:
    criminal, crook, felon, malefactor, outlaw
    someone who has committed a crime or has been legally convicted of a crime
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