Orig., at Sydney, a cold and violent south or southwest wind, rising suddenly, and regularly preceded by a hot wind from the north; -- now usually called southerly buster. It blew across the Brickfields, formerly so called, a district of Sydney, and carried clouds of dust into the city.  [Webster 1913 Suppl.]

 By confusion, a midsummer hot wind from the north.  [Webster 1913 Suppl.]