WoW Metal
Also known as Epic or Power Metal. An alternate name for the genre of heavy metal which consists of music written entirely about high fantasy, including but not limited to gnomes, elves, dwarves, magic, dungeons, epic battles, questing, monsters, etc.
Ashley: Dude check out this awesome new Blind Guardian song!

Joe: What the hell... is this like WoW metal or some shit? You're such a nerd.

Ashley: I challenge you to a duel, fucker.