零こぼれ幸ざいわい

noun

unexpected good luck; windfall

Refers to a stroke of luck that comes without effort, like a lucky break or a piece of fortune that falls into one's lap.

• 宝たからくじに当あたるなんて、まさに零こぼれ幸ざいわいだ。

  Winning the lottery is truly an unexpected piece of good luck.

• 彼かれの成せい功こうは努ど力りょくの結けっ果かではなく、零こぼれ幸ざいわいだった。

  His success was not the result of effort but a windfall.