The perfect thing to say when you haven't been listening to a conversation that you started. This works for an answer to virtually any question. Perfect for answering if you can't hear the speaker in a crowded, loud room.
Friend: "So how've you been lately? Any better?"
You: "WHAT?"
Friend: "I said, HOW'VE YOU BEEN?"
You: (panicking) "Oh, uh...I don't know, man, it's just like...I don't know, ya know?"
Friend: "Yeah, totally."
Phrase used to reply to a question that can not be answered or does not want to be answered; It may also be used to piss off your friends when they are looking for an answer.