The word "manic" means showing extreme excitement or hyperactive behavior, often associated with a high level of energy or intense emotions. Full definition
And there are plentiful delights to be found in the eclectic supporting cast, from Wasikowska's fragile love interest, adeptly staying this side of manic pixie dream girl territory, to return appearances from all the principles of «Submarine» (it's impossible to dislike a film in which Paddy Considine essentially plays Doctor Who), to J. Mascis, of all people, as a janitor. (indiewire.com)
sleep for days, brain fog, depression cant get out of bed and days of not sleeping, and almost in manic state. (thyroidpharmacist.com)
In the wrong hands, Indignation might have become a standard exercise in genre conventions, mixing period drama with a dash of Jewish neuroticism and a pinch of manic pixie dream girl. (scene-stealers.com)