逆さか夢ゆめ

noun

dream that goes against reality; dream that predicts the opposite

Refers to a dream whose content is contradicted by actual events, often used in the context of dream interpretation where a dream is believed to foretell the opposite of what will happen.

• 試し験けんに落おちる夢ゆめを見みたけど、逆さか夢ゆめだったみたいで合ごう格かくした。

  I dreamed I failed the exam, but it seems it was a dream that predicted the opposite, and I passed.

• 宝たからくじが当あたる夢ゆめを見みたが、逆さか夢ゆめで当あたらなかった。

  I dreamed I won the lottery, but it was a dream that went against reality and I didn't win.