backblock

noun[usually plural]3

1. •
   (Australia, New-Zealand) A remote tract of land in the interior; hence (in plural) sparsely populated country far from major cities and lacking conveniences common in urban areas.

   • I speak solely for the backblock roads, and I contend that the time has arrived when the Government should turn its attention to the metalling of these roads. — 1931
2. •
   (Australia, informal) The most distally outlying suburb among a set of suburbs.
3. •
   Land behind which fronts on water; land without a permanent watercourse.