Wow, Wikipedia has entries for both words:
yobbo,
bogan.
The term bogan (pronounced /ˈboʊɡən/, rhyming with slogan) is Australian and New Zealand English slang, usually pejorative or self-deprecating, for a person who is, or is supposed to be, of a lower-class background and whose characteristics exemplify, often crudely, this background. The speech and mannerisms of a bogan, according to the stereotype, are such as to indicate poor education, a preference for cheap clothing, and uncultured upbringing. 'Bogans' tend to reside in outer metropolitan areas or large country towns.
Similar concepts exist under other names in other countries, such as chav, scally or pikey (England), ned (Scotland), scanger and spide (Ireland), tokkie (Holland), Proll (Germany) and white trash, redneck, hick, hillbilly (North America), or baianão (Brazil).
The term has recently been applied to real estate, aka "boganvilla", to describe large houses on small blocks of land in outer suburban areas, similar to the term "McMansion" in the United States. This term plays on the plant name "bougainvillia", considered a weed in northern parts of Australia because of its prolific growth habit.
The term's popular usage emerged in Melbourne's outer-western and -northern suburbs in the late 1970s and early 1980s as a non-pejorative term, used by fans of Heavy Metal and Hard Rock music to describe themselves, and was used almost interchangeably with "head-banger". Bogans typically wore "acid wash" jeans, sheepskin moccasins, and band T-shirts; had "mullet" style haircuts; and lived in the suburbs. The usage of the term has since changed to indicate someone generally suburban and poorly educated, and has little relation to the original usage which was specific to Heavy Metal and Hard Rock fans. Also, the usage has changed to include females. Female bogans were known as "mocca chicks" for the sheepskin moccasins which were customarily worn as footwear.
