Often results from not AttendingLectures. To avoid exclusion, a student must pass more than 50% of their units. It also helps not to punch any Lecturers.
There are several kinds of exclusions offered by the University, the most commonly selected by Unisfans is the one year exclusion, where you can spend all year in the club room without having to worry about boring lectures or tutorials. Some exceptionally enthusiastic card players managed five years, which is a good way to influence generations of freshers without having to leave the room - ever.
It also helps to remember that after 10 years of failing to complete your degree unit credits start to disappear. Making it progressively more difficult to actually finish the aforementioned degree.