A pyromainiac or pyro for short is a person that loves fire, they like to destroy things with it and they are drawn to it. I for one am a pyro and theres nothing wrong with that other than the fact i'm probably gonna be in juvy for arson soon but fire is a very suductive element and although people like it there are only a few pyros left.
Jeff: dude that girl has always got matches with her even though she doesnt smoke
Ken: i know dude shes a pyromainiac she was in juvy last year for arson
Me: I can hear you ya know!!!