A person, normally a pre-pubescent girl between the ages of 8-14, who is "addicted" to twilight and all related paraphernalia. This includes non-stop babble about the books and movies and obsession over sparkly objects.
9 year old girl) OMG, like I totes luv Rob P. LOL
normal 9 year old girl) *facepalm* Why didn't you tell me you were a twidict?
Man 1) Dude, can you believe what Bella is doing to Edward? I mean he is trying to protect her and the vixen is..
Man 2) Shut the hell up! Grown men should not be twidicts like you!