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Gnarmac is a slang word used by skaters and freeborders representing the ability to shred the road as if it was snow.

Combination of the words Gnar meaning snow, and tarmac as in the road surface.
We only have snow on the east coast for about 3.5 months, so at least we have plenty of Gnarmac to shred the rest of the year.
by Kunks5 January 02, 2012
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