sofa-surfing
noun [ U ] informal uk/ˈsəʊ.fəˌsɜː.fɪŋ/ /ˈsoʊ.fəˌsɝːfɪŋ/
沙发冲浪（因为没有住所而到多个朋友或亲戚家寄宿，比如睡在别人家的沙发上）
staying with a series of different friends or relatives, sleeping, for example, on their sofa, because you do not have your own place where you can stay
Matthew remembers his experience of sofa-surfing as a homeless teenager. 马修记得当他只有十多岁无家可归时的沙发冲浪经历。