What is a "Twihard" exactly?

Well, for me

Twi-fan= 당신 just like the 책 and movies, but are willing to accept that Harry Potter and other things are good as well. When twi-fans have a debate, they use good, structured debate, that makes sense.

Twi-hard= Pretty much in 사랑 with Twilight. They occasionally use silly points such as 'Edward's hot', but can have decent reason from time to time.

Twi-tards. Completely obsessed with twilight, and fail to understand why anyone else might possibly like anything else. These people 더 많이 또는 less always use points such as 'EDWUURD ISSZSS FITTT' and they normally have VERY bad writing, almost like they've written it right and then purposely destroyed the sentence structure

I know 당신 only asked for Twi-hards, but I find it easier to explain showing the whole scale :) x

Everyone seems to have their own definition of 'Twihard.' For some, it's the stereotypical 팬 - the one with the shallow and ludicrous reasons for liking the series and who can't spell. Others just use it as an all encompassing term.

I use it when talking about the 'die hard' fans. The ones that are obsessed with the series - both 책 and movies.

I've seen people discuss it and their definition was a sexually driven offensive term.

I don't like explaining this, but I will.
A 팬 who likes Twilight so much, it sexually arouses them.

I think it's inappropriate.

I always thought it was like hard core Twilight 팬 또는 당신 know how they have those die-hard 팬 medles, like that only Twi instead of die.

This is kinda' my short vocabulary on the Twilight liking stages.

Twifan: Semi to Dedicated
Twihard: Die-Hard
Twitard: Fanatic

Twihard=someone who likes Twilight.

Twilighter/Twilight 팬 = The normal everyday Twilight 팬 and they reason well. They are in every sense of the word, normal people
Twihard = A dedicated Twilight fan, may occasionally indulge in "Edward is hot" arguments, spells normally.
Twitard = The rabid Twilighter, stage one. Spelling is not up to standards but intelligible, indulges very often in "Edward is hot" fallacies.
Twazi = The rabid Twilighter, stage two. May committ murder on behalf of Stephenie Meyer, spelling is unintelligible. Behaves like the most extreme of extreme internet trolls.