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Sasaeng comes from the term “private” in Korean. A sasaeng fan is a K-pop fan who stalks or harasses their idols. They follow their idols and sometimes try to injur them. Sasaengs are not good people at all and should NEVER be supported.
Did you hear about the sasaeng that got BTS’ location off a BigHit employee?
Sasaeng by yunacore February 18, 2019
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Sasaeng is a bitch that live in this beautiful earth only for ruined biases' life. They stalk, they made our bias' life suffered. They should not live in this world. Universe must be agree.

"Sasaeng fans shouldnt have the word fans, we should just see them as sasaengs." -Heechul
Sasaeng
Sasaeng by exosparkle January 5, 2014
A sasaeng is an overly obsessed K-pop fan whose life is dedicated to harassing korean idols and celebrities.
Their typical actions can include following around said idols, stalking, taking photos and videos without permission, entering their private spaces, sending disturbing messages and sometimes threatening the idol because of their sick obsession, physically harming other fans and idols. Some sasaengs collaborate by selling and exchanging to one another private informations. (ex. airport flights informations, dorm addresses, personal phone numbers...)
Report that profile, that's a sasaeng who claims to have idols' phone numbers. Truly disgusting.
Sasaeng by onyx.telescope April 5, 2020
In Asian and specifically South Korean culture, a sasaeng, or sasaeng fan (Korean: 사생팬; Hanja: 私生팬), is an obsessive fan who stalks, or engages in other behaviour constituting an invasion of the privacy of a Korean idol or other public figure.
As BTS was leaving the airpot to get to their flight, a sasaeng came and tried to tackle one of the members.
sasaeng by Savage101Bosslady January 6, 2021
A sasaeng is an overly obsessed K-pop fan whose life is dedicated to harassing korean idols and celebrities.
Their typical actions can include following around said idols, stalking, taking photos and videos without permission, entering their private spaces, sending disturbing messages and sometimes threatening the idol because of their sick obsession, physically harming other fans and idols. Some sasaengs collaborate by selling and exchanging to one another private informations. (ex. airport flights informations, house addresses, personal phone numbers...)
Report that profile, that's a sasaeng who claims to have idols' phone numbers. Truly disgusting.
Sasaeng by onyx.telescope April 5, 2020
ARMY, to a Stay: Oli London is such a sasaeng oh my god.
Stay: Yeah, he's after Felix now.
Sasaeng by babystay~ October 22, 2020