Kook or Not #1

Gnarly

What does it mean? 2 guesses left.

1. AA clumsy or inexperienced surfer, similar to a kook.
2. BSomeone who is wildly enthusiastic about surfing and wants to be in the water all the time.
3. CA day-tripper or tourist at the beach, usually unaware of surf etiquette.
4. DDangerous, extreme or intimidating.