Possible Duplicate:
What is an appropriate response to “what’s up” greeting?
Response to “What's up?” in various conversations
I recently came back from US, Over there I noticed people say What's Up all the time, and even in movies and shows that I watch. But when someone said that to me I was like "What I am supposed to say" I am just sitting here doing nothing, so I always said hesitantly "Nothing". I am one of people who are always doing nothing, so It was really a pain. So what is it that is supposed to be said when someone says?
