A person who has an obsession/passionate love for the movie 'Twilight' and thinks they are experts on everything Twilight, but has, in fact, never read one of the books all the way through and is probably illiterate.
Susan: OMG Rob Pattinson is so hawt as Edward he's perfect for the role and I love how he's all angsty and sexy and how Bella's so beautiful I wish I could be her and maybe Edward would drive me around in his silver hatchback!!!
Karen: It's actually a volvo, hon. You're such a twilet. *scoffs*