beyond the black stump, back of Bourke or Woop-Woop ((Australia)wʊp.wʊp) - a generic far-off place or area in the countryside far from a town or city; similar to the sticks, Timbuktu or Waikikamukau; Woop Woop is used particularly for any small unimportant town
billabong - an ox-bow river or watering hole
bush - the hinterland, the Outback, anywhere that isn't in town
within cooee - nearby, nearly, close to; hence not within cooee - a long way away, far off, not close to; also used figuratively, for example "England weren't within cooee of beating Australia at cricket."
O.S. - overseas
Outback or Never Never - interior/centre of Australia