What does Joey mean by "You don't say!"

A:He doesn't agree with the woman.

B:He loves the woman's adress.

C:The woman doesn't need to speak any more.

D:He likes the woman's shape.

解析：D。首先You don't say表示“可不是吗！”的意思，因此A不正确，应该是agree，B不正确，重点在boobs，C不正确，不懂俚语的真正含义。D正确，Joey正是喜欢对方的体型。

====原文====

Joey: Hey, Angela.

Angela: (casually) Joey.

Joey: You look good.

Angela: That's because I'm wearing a dress that accents my boobs.

Joey: You don't say.