a TV serios from the 1900's
"There is a fifth dimension beyond that which is known to man. It is a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow, between science and superstition, and it lies between the pit of man's fears and the summit of his knowledge. This is the dimension of imagination. It is an area which we call the Twilight Zone."
when girls/guys are so in love with the books/movies of twilight, so that is all they think of: they bring the books to lunch, where tee shirts... so on, and so on,
a state of mind where you keep day dreaming and can't concentrate.
TW used in instant messages short for twilight zone, can work for any definition if used correctly.
rob: have you seen the episode of the twilight zone last night?
tom: yeah it was scary!
keke: samantha is so in the twiloght zonem that book is all she can think about!
amanda: I KNOW!
thomas: you were so in the twilight zone today during math!
michael: i know it is just so boring!
sierra10104eva: i was in the TZ in I.L.A. today...
mikkeee03n3: yeah you were staring right at me! the whole class!