ぶらぶら病やまい

noun

lingering illness; chronic ill health; long-term malaise of uncertain origin

Medical term for a persistent, vague illness without a clear diagnosis; often implies a state of being unwell over a long period.

• 彼かれはぶらぶら病やまいで、もう半はん年としも仕し事ごとを休やすんでいる。

  He has been off work for half a year with a lingering illness.