do-or-die

[doo-er-dahy]
adjective
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.

Origin:
1875–80

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
do-or-die
 
adj
(prenominal) of or involving a determined and sometimes reckless effort to succeed

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
He has cash and guns to sustain him, as well as cunning, ruthlessness and do-or-die determination.
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