When one uses you to ask an uncomfortable question to someone. They are normally as curious (or even more) than you are but they prey on your curiosity to distance themselves from the question, getting you to do their dirty work for them.
Jan: Hey Felicia, don't you want to know what happened last night between John and Michelle?
Felicia: Sure, but it would be awkward to ask him, right?
Jan: Well, you should just do it. And then tell me all about it!
Felicia: Ok, I guess I'll be your question bitch!