Someone who has intense and/or sexual feeling towards the internet personality "Pyrocynical".
These people can be binary or non-binary but most of them are lesbian/gay.
Person a): Hey man
Person b): Hey dude, what's up?
Person a): I think I'm feeling kinda Pyrosexual!
Person b): What's that?
Person a): Oh, I wanna f*ck Pyrocynical.
Person b): The youtuber?
Person a): Yeah!
Person b): Me Too!
Person a): You're the best friend ever.