How about you?
A phrase used to extend a previously-asked question to someone else. A: "How've you been, Ted?" B: "Oh, I've been fine. How about you?" OK, one coffee, and how about you, Miss?
How about you?
What do you think?; What is your choice?; What about you? Bob: How are you, Bill? Bill: I'm okay. How about you? Bob: Fine, fine. Let's do lunch sometime. Waiter: Can I take your order? Bill: I'll have the chef's salad and ice tea. Waiter (turning to Sue): How about you? Sue: I'll have the same.