cliché
noun [ C or U ] uk/ˈkliː.ʃeɪ/ us/kliːˈʃeɪ/
C2 陈词滥调，老生常谈，老套的话
a saying or remark that is very often made and is therefore not original and not interesting
My wedding day - and I know it's a cliché - was just the happiest day of my life. 我结婚那天——我知道这是老生常谈——是我一生中最幸福的一天。