I am really hooked on watching Seinfeld; it is really my favorite series. Now in one of the episodes the sentence in bold is used:
Kelly the Waitress: Well, what's it going to be?
George: What's it gonna be?
Kelly the Waitress: Yes. What'll you have? Are you eating? It's in that vein.
George: I’ll eh, I’ll just have a bowl of chili.
I always wondered what that means. I couldn't even understand it, I had to search for the script of the episode, and look at what was actually said.
What is she trying to say, and how do you use this phrase?