Wiktionary
rustle up
vb. (context idiomatic English) To forage for, or (figuratively) to quickly prepare, something.
Usage examples of "rustle up".
Maybe she could find the money somewhere else, rustle up another grant somewhere.
We'll go back and mix ourselves a nice, cold jug of vodka martinis, and then I can rustle up some hamburgers and salad, and we can play Mozart and talk about us.
When we get back, we'll ask Sally, who is waiting in our quarters in the fort, to rustle up something for us.
He heard a rustle up ahead and turned just in time to catch the pommel of a swinging sword squarely in the face.
He bent over to gather up the shirt they'd thrown to the floor and rustle up a cheroot and a light as he explained.