to rustle up
Webster's Dictionary (GCIDE)
Rustle \Rus"tle\, v. i. [imp. & p. p. Rustled; p. pr. & vb. n. Rustling.] [AS. hristlan to rustle; or cf. Sw. rusta to stir, make a riot, or E. rush, v.]
1.To make a quick succession of small sounds, like the rubbing or moving of silk cloth or dry leaves. [1913 Webster]
He is coming; I hear his straw rustle.— Shak.[1913 Webster]
Prouder than rustling in unpaid-for silk.— Shak.[1913 Webster]
2.To stir about energetically; to strive to succeed; to bustle about. [Slang, Western U.S.] [1913 Webster]
3.To steal; -- used of livestock and esp. of cattle. [PJC]
To rustle up To gather or find by searching; as, to rustle up some food for supper. [PJC]