ostentation
/ˌɔstenˈteɪʃn; ˌɑstɛn`teʃən/ n[U]
(derog 贬) exaggerated display (of wealth, knowledge, skill, etc) intended to impress people or make them envious （对财富、 知识、 技巧等的）夸耀, 炫示, 夸示, 卖弄
the vulgar ostentation of the newly rich 暴发户庸俗的摆阔
Their daughter's wedding reception was sheer ostentation. 他们女儿大办婚事纯然是为了炫耀.