never-say-die

never-say-die (not comparable)

1. That does not give up in despair; indomitable.
   • 2011 January 25, Phil McNulty, “Blackpool 2 - 3 Man Utd”, in BBC‎:

     In another demonstration of the resilience and never-say-die spirit that is built into this United side, they hunted Blackpool down once they had the whiff of victory and there was almost an inevitability about the final outcome once they found a foothold in the game.

• never say die