Contrary to popular belief, gnarly dude, is not a description of a dude at all. It is an expression generally used after witnessing or otherwise perceiving through a third party any event that is impressive, unbelievable, extraordinary, or out of this world. The phrase is much more closely related to other phrases such as "wow", and "amazing", than to "That dude is gnarly".
*A meteor falls from the sky and lands in the Pacific Ocean causing a tsunami that will surely kill all of the surfers on the beach*
Surfer 1: Fuck my life.
Surfer 2: Gnarly dude.
By www.gnarle.com hook us up with a link !!!!