Wiktionary
ready up
vb. (context idiomatic transitive English) to prepare for use, to get ready
Usage examples of "ready up".
They appeared to be ready up in their craggy places, and just waiting for the order.
Although perhaps the great dead cold had started to settle in even earlier, that first day of the new world, while they were driving off across foundering Brigantine, the water al-ready up over the hubcaps of the Toyota, and he had heard Toby barking frantically somewhere behind them.
A week ain't much to ready up a horse for a race, but he ain't got no fat to work off, and he knows the game.