A sub unit is a smaller group formed from the members of a larger kpop group for a music release or project, generally with a different concept from the original group.
"I really like 4minute's subunit 2Yoon"
EXO-CBX is the first offical sub-unit of EXO
Sajaegi (ì¬ì¬ê¸° in Korean) is kpop term for when companies buy their own artists' content to make them rank higher in charts, catching the public's attention and selling even more than they would normally do, recovering the initial "investment" their company made.
"Netizens clear up suspicions of BTS' alleged sajaegi"
A term created to distinguish normal aegyo (more colorful, vivid, silly and cute) from a puritan aegyo, which tends to exhibit a large amount of pureness.
Gfriend's white aegyo in 'Rough' makes me sick
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