A Fandom that is dedicated to hating a work, idea, community or author, instead of loving it.
Of course, to have some form of credibility, it's best to have actually read/watched/played/listened/joined/followed to some of the hated work, but some people usually hate without having any knowledge or something parroted to them by another hater.
If you hate the fandom of a loved work, you part of a Hatedom.
If you hate the fans of a fandom, that makes you a Fan Hater.
A Fan Hater does not have to be part of a Hatedom.
Anti-Fans of a work are likely to view its fandom as a Fan Dumb.
Fans of a work are likely to view its Hatedom as a Hate Dumb.
Tom - "Hey Mr. Hales- lets go hit up some beers"
Mr Hales - "No dude - I am totally Haled Out from what you put me through last night"
Tom- "You really need to quit getting so Haled Out"
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.