Super awsome, most dank, sexy,make you want to kill a goat with your feet crazy. On the offical "Fonzie Coolomatic Cool Rating Machince" the Fonzie macine rates your from -10 Fonzie's or simply put 10 Chachi Arcola's. And goes all the way to 10 Fonzie's. Gnarly means at least 15 fonzies, putting the "Fonzie meter" into the red and is know as Uber Fonzie.
Timothy S. Rathbun: "Dude did you go to the party last night?"
Brian L Strunck: "Yeah and guess who showed up and 5 mins later the cops came?"
Timothy S Rathbun: "Had to be Amy Spencer, the most gnarly chick in the L.H."
Brian L Strunck: "Right on Maverick."