Pop Chinese: 帅呆了！

shuài dāi le!

帅 呆 了！

So handsome!

A：我可以试一下吗？

Can I have a try?

B：当然可以，给您。

Of course. Here you are.
(After he put the clothes)

A：我穿这件帅吗？

Am I handsome when I wear these clothes?

B：哇，帅呆了！Wow, yes, you are so handsome!

“X dāi le （X 呆了）”, originated from Chinese dialect, this structure means “X extremely”, it often be used as “shuài dāi le (帅呆了)”(very handsome) or ” měi dāi le (美呆了)”(very beautiful).