1. The world outside the Internet.
2. The world outside the education system/academia.
3. The world as experienced by those who are not wealthy and have no friends in high places.
1. Sorry I haven't been in the chatroom lately, the real world got in the way.
2. All those bleedin'-heart intellectuals ain't got no idea 'bout the real world.
3. She has such an easy life. She should try living in the real world sometime.