firebug
/ˈfʌɪəbʌɡ
/noun informal
An arsonist.Youngsters are facing a summer without a youth club after firebugs torched a sports pavilion, destroying its sports equipment....
- Foolish firebugs who torched piles of rubbish across York early today have been accused of endangering lives.
- Fire chiefs today vowed to tackle school arsonists after new figures revealed firebugs were behind hundreds of fires costing more than £7m.