Definition of mountain dew in English:

mountain dew

noun

informal
  • Illicitly distilled liquor, especially whiskey or rum; moonshine.

    • ‘The Co Clare distillery has been working at full tilt for the past few months to get enough legally made mountain dew out to the US in time for the annual celebrations.’
    • ‘One local comes from a recognised poitin-making dynasty - his father and grandfather before him were acknowledged to be among the area's finest producers of the mountain dew.’
    • ‘Everybody seemed to know his job and needed no incentive to carry it out other than the hope of a taste of the real old mountain dew.’

Pronunciation

mountain dew

/ˈmount(ə)n d(y)o͞o/