大だいチャンス

noun

big chance; golden opportunity

Emphatic way to say a very good opportunity, often with a sense of excitement or urgency.

• 今いまが大だいチャンスだ。逃のがすな。

  This is a big chance. Don't miss it.

• 彼かれにとっては大だいチャンスだったが、結けっ局きょく失しっ敗ぱいした。

  It was a golden opportunity for him, but he ended up failing.