(sometimes derogatory) An extremely obsessive fan of a person, group, character, or creative work, particularly one whose fixation is unhealthy or intrusive.

“IU stan; BTS stan; K-pop stan”

To act as a stan (for); to be an obsessive fan (of).

“We stan a queen.”

One of the stans; any of the ex-Soviet countries and their neighbours whose name ends with "-stan" such as Turkmenistan, Uzbekistan, and Kazakhstan.