From Longman Dictionary of Contemporary Englishscare something ↔ up phrasal verb American English informalMAKEto make something although you have very few things to make it from Let me see if I can scare up something for you to eat. → scare→ See Verb table
Examples from the Corpus
scare up• Within another ten paces, I scared up two additional jackrabbits, both of which ran downwind and out of sight.• The few customers he could scare up would pay two dollars a week on a tailor-made suit. 