English edit

Etymology edit

mega- +‎ gallon

Noun edit

megagallon (plural megagallons)

  1. A unit of volume equal to one million gallons.
    • 2019 December 18, Joe Hyde, “Congressman Conaway Votes Against "Impeachment Charade"”, in San Angelo LIVE![1]:
      Yes, Trump is a vile creature whose presence in the Oval Office will require about a megagallon of disinfectant to cleanse it of his presence when he leaves it.