‘跑爪’ is a verb meaning 'to scratch with claws', typically describing the rapid, repeated clawing motion animals make—especially cats, dogs, or birds—when digging, marking territory, or expressing agitation. Though composed of 跑 (literally 'to run') and 爪 ('claw' or 'talon'), the term is not about running but rather evokes the swift, scraping movement of claws against a surface. It emphasizes both speed and physical contact, often implying restlessness or instinctive behavior.

This expression is commonly used in descriptive, observational, or narrative contexts—such as animal behavior reports, children’s stories, or pet care discussions. It is not used for human actions, nor for gentle or deliberate scratching (e.g., scratching an itch). While grammatically a verb, it usually appears in progressive or habitual constructions (e.g., 正在跑爪, 总爱跑爪) and rarely functions as a noun or subject on its own.