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...)