A wonderful person who is just enthusiastic about their favourite creators (e.g. Dream, GeorgeNotFound, Ranboo, Tubbo, TommyInnit) and discusses them, makes fanart and supports them with other people, usually on Twitter or Tumblr. What most people think of as "dream stans" e.g. dreamsexuals or dreamgenders are just dream antis trolling to make us look bad.
Person 1: did you hear that Emily is a dream stan?
Person 2: Yes, she is a really nice person who I was discussing our favourite creators with yesterday.
Person 3 (anti): Another fatherless child