"restudy student") is a Korean term for graduated high school students who decide to spend a year studying to re-take the College Scholastic Ability Test, hoping to get a higher score and enter the university of their choice.
Gaining entrance to the extremely competitive and prestigious SKY universities in Seoul requires that some students become jaesusaeng after an initial less-than-stellar performance on the national exam.
The fierce competition for enrollment at prestigious universities is called "entrance exam war" (입시전쟁; 入試戰爭; ipsi jeonjaeng).
[3] When a student fails to earn an adequate score over 3 or more years, he may be derisively referred to as a jangsusaeng (장수생; 長壽生; lit.
Beginning around 2010, the word "N susaeng" (엔수생; N壽生) is in common use, wherein the Chinese character jang (長, meaning "long") is replaced with the Latin letter N, which represents the undefined number of times the student is taking the test.