A gnar dog is usually a title given by themselves of how awesome they think they are. They are conceded, unintellegent, and gay. They are faggots, and more than likley emo. They cut their wrists almost every day. They like to take it in the rear cause they are gay. If for a rare reason a gnar dog isn't with a dude, then he is going out with a manly dyke.
gnardog: Look at me! I'm so freaking gnar! I own at BMXing! I got a gf!
me: meh, you aren't a good BMXer at all. And it looks like your "gf" is a man.
gnardog: Dude, bra, I'm still pretty freakin gnar, even though I like thatbutthole action i get from from Ken. Im a gnar dog!
Expressing a physical art such as skateboarding in an excessively stylish manor. Derived from the English Gnarly meaning "Quite dandy" and the English suffixes dog shred meaning “to finely dice an animal that is larger than a cat yet smaller than a horse." *Note* The word's emphasis is largely expanded if surrounded by "cash-money" signs as shown in the example bellow. Do not become bamboozled, "Nardogshred" is not a widely accepted currency! Although acceptations are made if Rad Percy is taking up residence in your neck of the woods.