'卖衣服' is a verb phrase meaning 'to sell clothes'. It combines the verb 卖 (mài, 'to sell') with the noun 衣服 (yīfu, 'clothes'), forming a common action-based expression used in commercial, daily, or entrepreneurial contexts. Unlike standalone nouns, this phrase emphasizes the activity of offering garments for sale — whether in a shop, online, at a market, or even secondhand.

The phrase is neutral in register and widely used across spoken and written Chinese. It does not specify who is selling (e.g., individual vs. business) or what type of clothes, so context usually clarifies those details. Note that 衣服 is a compound noun (衣 + 服), both characters historically related to covering the body, and together they always mean 'clothing' as a general, uncountable concept — never 'a piece of clothing' (which would require a measure word like 一件衣服).