Meaning of do-or-die

do-or-die

Pronunciation: (d'ur-dī'), [key]
— adj.
  1. reflecting or characterized by an irrevocable decision to succeed at all costs; desperate; all-out: a do-or-die attempt to halt the invaders.
  2. involving a potentially fatal crisis or crucial emergency.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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