'待会儿' (dāi huìr) is an informal, spoken adverb meaning 'in a little while' or 'in a moment' — typically referring to a short, unspecified time in the near future, usually within minutes or up to about half an hour. Though it looks like it contains the verb 待 (dāi, 'to stay') and the noun 会 (huì, 'meeting' or 'occasion'), here it functions as a fixed colloquial expression; the characters do not retain their individual meanings. The final 儿 (ér) signals the Beijing-influenced 'erhua' diminutive suffix, giving the phrase a relaxed, conversational tone.

This term is widely used in daily speech across northern and central China, especially when making casual plans, postponing actions, or softening requests. It’s rarely used in formal writing or official contexts. Unlike precise time markers like '十分钟后' (in ten minutes), '待会儿' conveys vagueness and flexibility — suggesting willingness to wait without committing to an exact moment.