do or die

/ˌduː ɔr ˈdaɪ/
adjective
  1. Describing a situation that requires extreme effort and determination, where failure is not an option.
    • It was a do-or-die moment for the climber as he reached the final ledge.
    • The company made a do-or-die decision to invest all its money in the new product.
    • The team faced a do-or-die match to stay in the tournament.
Antonyms
What does "do or die" mean? | whatsthatwordmean | whatsthatwordmean