An innocent word used for describing a cult of sleep-deprived people who obsess over one or multiple comics, books, tv shows, movies, video games, etc.
(I mean this in the nicest possible way, I am a member of a number of fandoms myself.)

someone who is sexy beyond mean

A group of people who willingly have their souls devoured by an obsession.

Run, run away and never look back

A fandom is a group, or community, of people who like a game, book, or specific topic. Usually on social media, a fandom is not a uncommon sight

Most people have gone into a fandom, and there is a most likely chance a person will go into a fandom, and leave one, once in their life.

Fandoms can be good or bad, depending on the age of people, the smarts of people, and the amount of cringe of people. Emojis and cringe, etc. can ruin a fragile fandom. Not to mention horny artists who have the urge to make porn. (At least the art is good.)

A cult that will destory your life

Fandom means family. And family means no one sits alone in mental institute. Because there are so many days when it looks like we are all going to end up in one.
( Warning: Prepare some cash, if you are joining fandom. Therapies are expensive)