大おお博打ばくち

noun

big gamble; risky speculation; large bet

Refers to a high-stakes gamble, whether literal betting or a risky venture with large potential loss or gain.

• その投とう資しは大おお博打ばくちだったが、成せい功こうした。

  That investment was a big gamble, but it succeeded.

• 彼かれは大おお博打ばくちを打うって、全ぜん財ざい産さんを失うしなった。

  He made a huge bet and lost his entire fortune.