Stan twitter slang popularized by twitter user @revengeofsakura. This means someone with celebrity worship disorder who is overly sensitive towards any reasonable comment, complaint, or criticism of a celebrity, usually because they are blinded by a toxic and unhealthy parasocial relationship.
Jake: I love Mariah Carey!! You just donât like her because youâre jealous!!
Sakura: No, youâre just offended that there are things about her music that I donât like because youâre a cupcake