Definition of Roman holiday in English:

Roman holiday

noun

  • An occasion on which enjoyment or profit is derived from others' suffering or discomfort.

    • ‘Still less welcome is he who would make a Roman holiday of our misfortunes.’
    • ‘He could well have blamed the Americans for what had befallen him - but today, he was not ready for a Roman holiday.’

Origin

Early 19th century: from Byron's Childe Harold, originally with reference to a holiday given for a gladiatorial combat.