Wiktionary
vb. (context transitive idiomatic English) To pay (usually a bill, debt or due).
WordNet
Wikipedia
Pony Up is a Canadian indie pop band formed in 2002 in Montreal.
Usage examples of "pony up".
Pony brought Dainsey around, and Bradwarden hoisted her seemingly lifeless form up over the short rise, laying her atop the flat plateau, then helping Pony up beside her.
Elbryan teased, and he lifted Pony up before him, biting her softly just under the chin, then turning his face so that his beard rubbed against her neck.
Then suddenly, he burst out in laughter and wrapped Pony up again, twirling her about.
Even if there were no lake, we could not get our baggage-pony up this stair.
Two clear yards and I hauled myself across its back, righting myself as an Indian stumbled under its hooves, and then I was urging the pony up and away from that horror, over grassy ground that was carpeted with still and writhing bodies, and beyond it little knots of men fighting, soldiers with clubbed carbines being overwhelmed by waves of Sioux-but there was a guidon, and a little cluster of blue shirts that still fired steadily.
Lindemann mounted a pony, snatched the reins of another and spurred his pony up alongside the railway track.