in BRIT, also use 英国英语亦用 hang about, hang round
1 PHRASAL VERB （在某处）等待，闲逛，闲呆着 If you hang around, hang about, or hang round, you stay in the same place doing nothing, usually because you are waiting for something or someone. （在某处）等待，闲逛，闲呆着 [informal]
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He got sick of hanging around waiting for me. [VERB PREP. verb-ing]
他等我都等烦了。
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On Saturdays we hang about in the park. [VERB PREP.]
每到星期六我们都在公园里闲逛。
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...those people hanging round the streets at 6 am with nowhere to go. [VERB PREP. noun]
那些无处可去、早上6点就在大街上闲逛的人
2 PHRASAL VERB 经常和…在一起;经常泡在 If you hang around ,hang about, or hang round with someone or in a particular place, you spend a lot of time with that person or in that place. 经常和…在一起;经常泡在 [informal]
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They usually hung around together most of the time. [V P together]
大多数时间他们通常都泡在一起。
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Helen used to hang round with the boys. [VERB PREP. + with]
海伦以前常和那些男孩子们厮混。
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...the usual young crowd who hung around the cafe day in and day out. [VERB PREP. noun]
通常日复一日泡在咖啡吧里的那群年轻人