‘跑沙’ (páo shā) is a verb describing the action of an animal—most commonly a dog or cat—using its front paws to rapidly scratch, dig, or paw at loose sand or soil. The character 跑 here is read as ‘páo’ (not the usual ‘pǎo’ meaning ‘to run’) and specifically conveys a vigorous, repetitive scraping motion with the paws. 沙 means ‘sand’, so together the compound literally evokes ‘pawing up sand’. It’s not used for human actions or mechanical digging.

This term appears frequently in descriptive writing about animal behavior, especially in rural or outdoor settings—such as dogs burying bones, cats covering waste, or desert animals preparing resting spots. It carries a vivid, onomatopoeic quality and is often found in children’s books, nature documentaries, and veterinary or ethological contexts. While not formal or technical jargon, it’s widely understood across Mandarin-speaking regions and adds sensory precision to depictions of animal movement.