in reply to I refer to a non-specified carbonated beverage as a:

Inside the US the situation is pretty clearly understood.

Outside the US (I have lived in many parts of Europe, the UK, Canada and Australia as well as the US) this possibly applies:

  • Soda: Soda Water similar to club soda.
  • Tonic: Tonic Water - as in Gin and Tonic.
  • Pop: rarely heard
  • Soft Drink: Pretty universal where English is spoken
  • Fizzy Drink: Never heard it anywhere!
  • Pop: common in parts of Eastern Canada - used interchangeably with soft-drink.

    jdtoronto - gee, guess where I live now :)