扔球 (rēng qiú) is a verb meaning 'to throw a ball'. It combines the verb 扔 (rēng), meaning 'to throw' or 'to toss', with the noun 球 (qiú), meaning 'ball'. Together, they form a straightforward action phrase describing the physical act of propelling a spherical object through the air with one's hand. The word is commonly used in everyday contexts involving sports, play, or casual physical activity — for example, during children’s games, physical education classes, or informal backyard fun.

Although 扔 can sometimes carry a negative connotation (e.g., 扔垃圾 'to throw away trash'), 扔球 is neutral and almost always positive or goal-oriented, focusing on motion and intent rather than disposal. It’s frequently used in imperative or descriptive sentences, often with subjects like children, athletes, or pets — especially dogs trained to fetch. The phrase is simple, colloquial, and widely understood across age groups and regions.