To chatter noisily; to twitter; to chirp loudly and confusedly (often used for small birds or people speaking excitedly and indistinctly).
下午茶时间，咖啡馆里坐满了客人，大家唧唧喳喳地聊着天，气氛非常热闹。
During afternoon tea, the cafe was full of customers, all chattering away, creating a very lively atmosphere.
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