Originally Posted by boo boo

I take it you don't even have the slightest f*cking idea what Extreme Metal is.

It's not a genre, and overall it's a very broad term, it's simply a cluster of various metal subgenres... Death Metal, Black Metal, Thrash Metal, Doom Metal and Technical Death Metal all qualifies as Extreme Metal, everyone I listed (only a some random amount of what I have actually heard) falls under one of those categories, thus making them Extreme Metal.