'Guā húzi' literally means 'to scrape whiskers' — 'guā' (刮) means 'to scrape or shave off', 'hú' (胡) is an abbreviation of 'húzi' (beard or facial hair), and 'zi' (子) is a common noun suffix. Though it contains the character 胡, which also appears in words like 'húlu' (gourd) or 'húqín' (a musical instrument), here it specifically refers to facial hair, not animals or plants. The term is colloquial and widely used in everyday speech for the act of removing facial hair with a razor, electric shaver, or other tool.

This verb is commonly used in daily routines, personal grooming contexts, and health-related discussions about skin care or hygiene. It’s typically transitive but often used without an explicit object (e.g., 'I shaved' → 'Wǒ guā le húzi'), and the object 'húzi' is rarely omitted since it's integral to the compound’s meaning. Unlike formal medical terms like 'tì húzi', 'guā húzi' conveys an ordinary, habitual action — something done each morning or before an important event.