conspicuous consumption
noun [ U ] disapproving uk/kənˌspɪk.ju.əs kənˈsʌmp.ʃən/ us/kənˌspɪk.ju.əs kənˈsʌmp.ʃən/
炫耀性消费
the situation in which people spend a lot of money intentionally so that other people notice and admire them for their wealth