1. a stand alone phrase used as a salutation, normally asked as a
rhetorical question.
2. a question that seeks to
understand a persons current condition (e.g., mood, plans of action, current actions)
3.
what's up?
1.
The friend said, "What goes on?" when he arrived at
the door of the man he would soon fellate.
2. What goes on, Buddy?
3. After hearing
the news, he arrived at his friend's house, approaching the door he asked, "What goes on?"