'嗦嗦叫' is an onomatopoeic verb that imitates the soft, rhythmic, sucking-like sounds made by very young infants or small animals—such as newborn puppies, kittens, or chicks—when they are hungry, seeking comfort, or expressing mild distress. The reduplicated '嗦嗦' (suō suō) emphasizes repetition and gentleness, while '叫' (jiào) means 'to cry' or 'to call', anchoring the action in vocalization. Together, the phrase evokes a tender, intimate auditory image rather than loud or sharp crying.

This expression is rarely used for older children or adults; it carries connotations of vulnerability, helplessness, and endearment. It appears most often in descriptive narrative writing, caregiving contexts, or affectionate speech about babies and young animals. Unlike general terms like '哭' (kū, to cry), '嗦嗦叫' specifically highlights the quiet, breathy, mouth-focused quality of the sound—similar to the noise made when gently sucking air through slightly parted lips.