A sasaeng, or sasaeng fan, is an obsessive fan who stalks or engages in other behaviour constituting an invasion of the privacy of celebrities, specifically Korean idols, drama actors or other public figures.

What is a BTS sasaeng?

Sasaeng fans in K-pop refer to fans or people who are obsessed with an idol.

What is the meaning of a Sasaeng fan?

These stalkers are referred to as “sasaeng” fans or often simply "sasaengs" — meaning “private life” — and South Korean idols, companies and international fans are more than aware of these practices and have public documents with blacklisted “fans.”