A certainty; a foregone conclusion; sure thing: Given Mamet's Shavian morality, it was a dead cert that one of his heroes would wind up in Hell/ Just why a dead cinch should be the securest of any, I confess I do not know (first form fr horse racing 1889+, second fr cowboys 1893+)
It, at any rate, is a chance, but the other was a dead cert.
I know something that's safe to win, bar accidents—a dead cert, sir!
I thought when once a clever boxer gave his honor on a thing it was a dead cert.
He'll be sitting in my study when I get home, for a dead cert.
They'll stop to hunt all about the place where they lose our trail, and then they'll follow up the pony for a dead cert.
I know something that's safe to win, bar accidents—a dead cert, Sir!
"One of their strafed raiders coming here to roost for a dead cert," quoth the Hon. Derek.