metal-purist 

A Metal Purist doesn't necessarily favor one genre of metal over another. They aren't like metal elitists.. The difference between a metal purist and a MetalHead is the fact that Metalheads will also allow core to be called Metal, where as a Metal Purist realizes the difference between the 2 separate genre's backgrounds. For instance core is a music genre fusing elements of hardcore punk and various forms of electronic music. Where as Metal has its roots from blues rock and psychedelic rock. A Metal Purist realizes the difference between the 2 genres and will defend the Metal name against people who try to infuse the 2 genres. Hence the name PURE.

"Core is nothing like metal, I am a Metal-Purist."

metal-purist by Those Fuk'n Metal Heads/on FB September 15, 2013

heavy metal purist 

1. Noun referring to a heavy metal fan who subscribes to the ideology of heavy metal purism.

2. Noun referring to a heavy metal musician who does not incorporate elements from outside of the heave metal genre into his or her music.

Also referred to as 'metal purist' or 'metal-purist'.

When the name of Kuopio's choirmaster was revealed in autumn, heavy metal purists got upset.

Following the breakup of the Runaways and the huge success of Joan Jett's first two albums, Lita Ford emerged as a solo artist and a true heavy metal purist.

heavy metal purist by Master of Evöl March 20, 2011

heavy metal purism 

Noun describing a mindset among certain heavy metal fans who are preoccupied with distinguishing between "true metal" and "false metal". Typically, heavy metal purists dislike false metal, which often is taken to include glam metal, nu metal, alternative metal and metalcore.

Heavy metal purism tends to be more prevalent among younger metalheads, especially black metal fans. Practitioners of heavy metal purism are sometimes referred to as heavy metal purists.

Also often referred to as "metal purism" or "metal-purism"

“I thought it was really cool,” says Henke remembering when Bring Me The Horizon talked wanting these futuristic sounds. “They’re so creative and had so many ideas about what they wanted.
“Sometimes we didn’t know quite what they had in mind,” adds Fredrik. “But in the end it all made sense.
Did it go against any ‘heavy metal purism’ you might have had?
“Haha, no,” he laughs. “Good stuff is good stuff, and bad stuff is bad stuff. They do it right. I think many bands will follow them.”

heavy metal purism by Master of Evöl March 20, 2011