Lethsemic
Lethsemic - a state of being after a night of not drinking, staying up late with friends. Where the lethargy of not being hung-over creates a state of hyper-confusion in which you do not know whether to slap the next person you see, cry, laugh or vomit in your own food out of sheer frustration. This is akin to a vanilla bender.
I can't be hungover because I'm sober - we didn't drink last night. I feel so lethsemic this morning...