dress up like a dog's dinner切忌译成“打扮得像狗的晚餐”。其实是形容穿着过于正式不合时宜或穿着装饰过多，过于花哨（贬义词）；穿的花里胡哨。

【例句】
She always dresses up like a dog's dinner.
她总是穿的花里胡哨的。

Look at that guy over there! He's wearing a tuxedo in this old pub. He dressed up like a dog's dinner!
看那边那个人，穿着一身燕尾服来这个老旧的酒吧。他穿的太过，太不合时宜了。