So, I'm reading a paper from the land of Oz, and the lead story is about the problem the local community is having with hoon drivers. The article uses the term in several ways, all referring to speeders and otherwise careless drivers. From the context, I discerned that the term meant "loutish", and I confirmed that meaning in the online compact Oxford English Dictionary. But the entry is very sparse, just:

noun a lout.

• verb behave like a lout.

— ORIGIN of unknown origin

Does anyone know more about this term?