I've heard a guy saying "What is your deal?" when hitting up on a girl two times on a TV show.
According to the Free Dictionary:
What's the deal? (informal) something that you say in order to ask someone to explain what they have been doing or what they are planning to do:
So, what's the deal - are we going out to dinner?
Here someone says that "What's your deal" is a way of asking "what's up".
The latter seems more plausible, though after having looked it up on the Internet it appears that it's just one man's opinion. So, which meaning of this question is right in this case?