Someone who gripes about the twilight saga or its fans despite whether they've read the series or not.
Person One: Bella and Edward are so lame! I can't believe you like them!
Person Two: Have you even READ the books? Seen the movie?
Person One: No but...
Person Two: Shut up Twi-Griper!
Someone who can't get enough of the twilight saga despite their ability to see the flaws in plot, content, etc....
Person One: You're reading New Moon AGAIN? I thought you didn't like her writing style.
Person Two: Yeah I just can't seem to get enough of it though... I'm such a twibiter!