Wiktionary
vb. (present participle of double down English)
Usage examples of "doubling down".
The secret mechanics of The System were hopelessly intricate, its parlance -- splitting, doubling down, hi-lo differential -- an insider's code, but the mainspring seemed to involve a species of card counting, a task Jessie could hardly imagine Dow mastering since whatever stores of patience and concentration he had managed to haul down with him from the north country had been thoroughly consumed out here in the great southwestern fry pan of loss and disappointment.
He tugged on Aeolus's rein, moving the gelding out of the path of sixty sepoy pioneers who were doubling down the road's left verge with pick-axes and shovels on their shoulders.
The Nassauers' battalion was doubling down the road, while their officers spurred towards the stream to mark the place where the infantry would form a line.
I had a glimpse of his towering bulk, with the smoky glare beneath him, and then the chorus of yells and screams from the hall redoubled, there was a rushing of feet, a splintering of timber - and East and I were doubling down the back-stairs at speed, Valla sobbing against my chest as I swept her along.
It collapsed in on itself: condensing, thickening, doubling down, gaining intent and body and mass.