deliberately setting fires; an impulse control disorder.

an uncontrollable desire to set fire to things

an impulse-control disorder characterized by a recurrent failure to resist impulses to set fires and a deep fascination with watching them burn. A defining feature of the disorder is that the fire-setting is undertaken without obvious motivations such as money, revenge or political ideology.

Pyromania is the third album by British hard rock band Def Leppard, released in 1983. It broke the band across North America and in Japan, and would sell over 10 million copies worldwide. It featured new guitarist Phil Collen and was produced by Robert John "Mutt" Lange.

An insane disposition to incendiarism.