last-gasp

From the figurative attributive usage of last gasp.

last-gasp (not comparable)

1. (colloquial) Happening at the very end of an event.
   • 2012 May 13, Alistair Magowan, “Sunderland 0-1 Man Utd”, in BBC Sport‎:

     Then, as the Sunderland fans' cheers bellowed around the stadium, United's title bid was over when it became apparent City had pinched a last-gasp winner to seal their first title in 44 years.

• last-ditch