...on caffeine and sugar or whatever, I wouldn't describe myself as sleepy. Yinged out, maybe...

Are there two forms (or possibly languages) of this word which "denote" the same state - the opposite of Yang. I know it as Yin. Therefore, I'd suppose the phrase would be Yinned out(sp?).(not that I would ever verbify a noun)

I'm much more intrigued by this use of 'patina':

Someone who is sleepy is someone who has a thin patina of sleep, someone not fully awake.