manic

Etymology

mania + -ic; Ancient Greek μανικός (manikós). Doublet of maniac.

adj

1. Of or pertaining to someone who exhibits mania or craziness; wicked.
   Reuniting the cast of Trainspotting for a new adventure 21 years on could have gone badly. The BBC's misjudged This Life + 10, bringing the cast of the iconic 90s TV drama back together, is a case in point. But [Danny] Boyle and his four musketeers give it just the right frantic, jaded energy and manic anxiety. 19 January 2017, Peter Bradshaw, “T2 Trainspotting review – choose a sequel that doesn’t disappoint”, in The Guardian, London, archived from the original on 2017-01-20
2. (psychiatry) Suffering from mania, the state of an abnormally elevated or irritable mood, arousal, and/or energy levels.

noun

1. A person exhibiting mania.