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1.
a person who can create and execute mind blowing guitar riffs

originally said by the prince of darkness himself Ozzy Osbourne when talking about Tony Iommi in an 1980's interview

ozzy osbourne - "..whatever I've said about Tony Iommi in the past, was a lot of anger, a lot of bitterness on both parts, but I've got to be truthful to you, he was one of the greatest all time riff merchants, I mean, he came up with some classic heavy metal riffs"
man: what track is this?, that riff is insane
man 2: it's sabbath!
man: who's the lead guitarist?
man 2: you idiot.. thats Tony Iommi, he's probably metals' best riff merchant!
by planet_telex July 13, 2012