overdressed
adjective uk/ˌəʊ.vəˈdrest/ us/ˌoʊ.vɚˈdrest/
穿得过于正式的;穿着过于讲究的
wearing clothes that are too formal or special for a particular occasion
Everyone else was wearing jeans, so I felt a little overdressed in my best suit. 别人都穿着牛仔裤，所以我感觉自己穿着最好的套装有点儿过于正式了。