triumphalism
noun [ U ] disapproving uk/traɪˈʌm.fəl.ɪ.zəm/ us/traɪˈʌm.fəl.ɪ.zəm/
志得意满，趾高气扬，洋洋得意
an unpleasant show of pleasure and satisfaction because you have won or done better than someone
There wasn't a hint of triumphalism in her acceptance speech at the awards ceremony. 颁奖仪式上，她的获奖演说丝毫没有洋洋自得的意味。