A type of fan that uses twitter, tumblr, or instagram that is obsessed with a celebrity, band, artist, etc. Usually very invested and follows their 'idol' closely. Used to be known as groupies or fan girls/fandoms.
Ariana Grande stans are going crazy over her new album
One Direction stans are waiting for the hiatus to be over
Someone who really likes a girl too much and repeatedly sends them embarrassing and obsessive messages despite not getting a message back, like the protagonist in the Eminemsong ‘Stan’
Typically used in reference to stan twitter where people make fan accounts of the person they stan.
It’s very fuzzy as to where the word originated, but it’s believed to have been taken from Eminem’s song “Stan” about a STalker-fAN who supported him so hard to the point where it took a dark turn.