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Someone who is a gnar dog, and also a friend of yours, or a person who is very good at what they do and you appreciate their skill. Can also be pronounced gner.
Guy#1: Wow the singer for that band is very good
Guy#2: Ya he is a friend of mine, He's my gnar/gner

or

George Kolias(from Nile) is my gnar/gner
by Metalman Keith April 21, 2008
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