must-win

American  

[muhst-win] / ˈmʌstˈwɪn /

noun

1. a contest, project, scheme, etc., of which a successful or victorious outcome is essential because anything less would negate all preceding efforts.

   This game is a must-win for the Tigers, who will be out of the pennant race if they lose.

   Her grades were good enough for any college, but she knew the entrance essay was her must-win.

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adjective

1. (of a contest, project, scheme, etc.) requiring a successful or victorious outcome because anything less would negate all preceding efforts.

   We’re now in a must-win situation—we either come in with the most attractive bid or we lose the building contract.

Etymology

Origin of must-win

First recorded in 1985–90; noun use of phrase must win

Example Sentences

I don't think you have to do it to win a World Cup, but it does give you experience in delivering during must-win games, and that mentality is required for the biggest prizes.

From BBC

Although frustratingly denied four set points on his opponent's serve, Cobolli wrested control of a must-win tie-break to force the decider - where he once again delivered.

From BBC

Houston really has a must-win Thursday against Buffalo.

From The Wall Street Journal

Flashes of attacking play against the Pumas gave some reason for optimism, but the fixture against Japan is a must-win if the Wales head coach is to preserve positivity.

From BBC

A victory by Jamaica and a loss by Curacao would have seen the former clinch a berth, but instead they'll face a must-win match against Curacao when qualifying concludes on Tuesday.

From Barron's