1. An epic combination of gnarly and nice.
2. An adjective used to describe something nicer than gnarly and gnarlier than nice.
3. Insane, super cool, exceptional
1. Gnarce! That cop just pepper-sprayed that Occupy hipster in the molestertache!
2. That gnarce Nun just did a kickflip off that Juggalo's head!
3. Mason, "Bro, I went to the liquor store and they were giving away free beer!"