Definition of least said, soonest mended in US English:

least said, soonest mended

phrase

proverb
  • A difficult situation will be resolved more quickly if there is no more discussion of it.

    • ‘Even the opposition does not press the question, and has little to say on the subject, as they too may have exploited the same funds in the past, or intend to in the future - so least said, soonest mended!’