subculture
noun [ C ] uk/ˈsʌbˌkʌl.tʃər/ us/ˈsʌbˌkʌl.tʃɚ/
（社会中某个人群特有的）亚文化
the way of life, customs, and ideas of a particular group of people within a society that are different from the rest of that society
youth subcultures 青少年亚文化
the gay subculture 同性恋亚文化