your/the last gasp
The moment before death; also, the end. For example, "Fight till the last gasp" (Shakespeare, 1 Henry VI, 1:2), or He was determined to stay at the party until the last gasp. This idiom alludes to taking one's last breath, literally (first example) or figuratively (second example). [Late 1500s]
the last gasp
COMMON The last gasp of a long process or period of time is the very last active stage of it. The summer of '92 may be looked upon with nostalgia as the last gasp of the live rock concert era. Eleven thousand years ago, at the last gasp of the ice age, the area was covered with forest. Note: You can also use last gasp before a noun to say that something is achieved at the last possible moment. Dalziel watched his side snatch a last gasp victory with two late goals. Note: These phrases come from 2 Maccabes 7:9 in the Apocrypha of the Bible. Seven brothers and their mother were tortured by King Antiochus, and one of the brothers spoke out defiantly `when he was at his last gasp', or when he was dying.
your (or the) last gaspthe point of death, exhaustion, or completion.
1996 Will Hutton The State We're In The failure of the 1994 rail strike was the last gasp of an old order.
your/the last ˈgaspthe point at which you/something can no longer continue living, fighting, existing, etc: People are saying that the group’s latest actions are simply the last gasp of a dying campaign.
A gasp is a quick deep breath.