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Gnar to an obscene extent, ie.

1. One of the coolest things you've ever seen.

2. One of the most disgusting things you've ever seen.

3. In describing surf/snowboard/skate terrain/conditions, incredibly good.
1. Bro, did you see that Maserati? Hefty gnar.

2. This fat chick was puking everywhere at that party, so hefty gnar.

3. We just got back from a dope session at Lower Trestles, surf was hefty gnar!
by Midnight_Toker February 13, 2009
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