From what I understood, (also from Rocketpower
Nice one Matt.) it's a Hawai'ian thing. It generally has to do with someone who decides to do something but neglects to learn how to do it correctly, safely, and in the proper fashion in groups so as not to put someone else in danger, much less themselves. As to the list of definitions, I generally use #6 the most. "6 Anyone that rides without all proper gear , rides recklessly, or rides beyond their limits."