matter of life and death, a
A very urgent issue, situation, or circumstance. This expression can be used either literally, as in She told the doctor to hurry as it was a matter of life and death, or hyperbolically, as in Don't worry about finishing on time—it's hardly a matter of life and death. First recorded in 1849, it alludes to such urgency that someone's life depends on it. Although a matter of life or death would make more sense, it is rarely put that way.
How to use matter of life and death, a in a sentence
As an example of good science-and-society policymaking, the history of fluoride may be more of a cautionary tale.
I disapprove of what you say, but I will defend to the death your right to say it.
Asia Bibi, as she is known, was arrested and sentenced to death.
As this list shows, punishments typically run to a short-ish jail sentence and/or a moderately hefty fine.
The most notorious states are Saudi Arabia and Pakistan, where death is an acceptable legal remedy.
I assure you, no matter how beautifully we play any piece, the minute Liszt plays it, you would scarcely recognize it!Music-Study in Germany|Amy Fay
This is the place where the Muscovite criminals are banished to, if they are not put to death.
I hate to be long at my toilette at any time; but to delay much in such a matter while travelling is folly.
Now, it immediately occurred to Davy that he had never in his whole life had all the plums he wanted at any one time.Davy and The Goblin|Charles E. Carryl
Dean Swift was indeed a misanthrope by theory, however he may have made exception to private life.Gulliver's Travels|Jonathan Swift