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1.
Someone who thrashes up the powder, the waves, or the streets with gnarliest amounts of awesome imaginable. Only a really rad dude can be a Gnar Star.
"Whoa man, look at him tear it up out there, he's a total Gnar Star.
by The Gnar Star August 17, 2009
 
2.
adj-half gnarly, half gangstar, basically anthing that rocks
whoa dude... that sh!t was gnarstar!
by j-moné June 04, 2005
 
3.
noun, meaning a girl that rocked all night and is gnarly the next morning.
"You are such a gnar star"
by Julia in down town Denver October 11, 2007