一いっ発ぱつ勝しょう負ぶ

noun

one-shot contest; make-or-break game; single-round match

A contest or situation where everything is decided by a single attempt, round, or decisive moment; no second chances. Often used figuratively for high-stakes, all-or-nothing scenarios.

• 決けっ勝しょう戦せんは一いっ発ぱつ勝しょう負ぶなので、緊きん張ちょうする。

  The final is a one-shot contest, so I'm nervous.

• この試し験けんは一いっ発ぱつ勝しょう負ぶだから、しっかり準じゅん備びしなければ。

  This exam is make-or-break, so I have to prepare thoroughly.