"Students who abandoned the university" is "대포자"(tae-po-ja) in Korean.
In other words, refers to the people who decided not to go to university, people who gave up the go college or university. In South Korea has more than 80% of university enrollment rate, people who do not go to college is the minority. High school class also becomes a lesson for the college entrance examination. Singer IU (아이유) is also one of the person who did not go to college.