in BRIT, also use 英国英语亦用 mill about
PHRASAL VERB (一群人)乱兜圈子，乱转 When a crowd of people mill around or mill about, they move around within a particular place or area, so that the movement of the whole crowd looks very confused. (一群人)乱兜圈子，乱转
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Quite a few people were milling about, but nothing was happening. [VERB PREP.]
有不少人在附近转来转去，可是什么事情也没有发生。
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Dozens of people milled around Charing Cross Road and Denmark Street. [VERB PREP. noun]
很多人在查令十字路和丹麦街周围徘徊。