1.Similar to an actual hangover, a Twilight hangover is the feeling a person has when they wake up after falling asleep reading twilight, new moon, eclipse, breaking dawn or even the rough draft of midnight sun.
2.Also like an actual hangover feelings of regret may occur. One may notice that they have no memory of anything of the previous night,or their only memory was of them reading until their eyes started to burn.
friend 1: Hey why weren't you in class today?
friend 2: man I was nursing the worst twilight hangover.