"that was a gnarley stack you had out there today man  "those were some gnarley waves you rode today dude"  "that was some gnarley powder""
a word that means 'rad' or 'awesome', commonly used by surfers, skateboarders or snowboarders
""that was a gnarley stack you had out there today man  "those were some gnarley waves you rode today dude"  "that was some gnarley powder""" What is the definition of "gnarley"?