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A phrase originally coined in Lake Tahoe on the West Shore (Best Shore) by Marie Ralston. A play on words, a twist on "Charlie Sheen" meaning crazy, insane, unbelievable etc.
It's a Gnarly Sheen blizzard outside.

I took a crazy fall on the mountain today. It was Gnarly Sheen
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When someone snorts a line of cum sprinkled with blow
We had a great night consisting of a dinner and a movie, capped off with a gnarly sheen.
by Coachjs May 22, 2018
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