一いっ本ぽん勝しょう負ぶ

noun

one-game match; single-elimination contest

Used in sports and games for a match decided by a single round or bout, often with a do-or-die feel.

• 決けっ勝しょうは一いっ本ぽん勝しょう負ぶで行おこなわれる。

  The final will be a one-game match.

• この勝しょう負ぶ、一いっ本ぽん勝しょう負ぶで決きめよう。

  Let's settle this in a single bout.