Definition of big smoke in English:

big smoke

noun

Australian
  • 1With the. The largest settlement in a particular region, especially a metropolis, ‘the big city’.

  • 2Generally. A city; a town.

  • 3Usually with capital initials. With the. London. In later use also denoting various other large industrial cities, especially Toronto.

Origin

Mid 19th century. From big + smoke.

Pronunciation

big smoke

/ˌbɪɡ ˈsməʊk/