maniacal

comparative more maniacal · superlative most maniacal

1. Like a maniac; insane; frenzied.

   He suddenly exploded into about three seconds of maniacal laughter and stopped again.

   1982, Douglas Adams, Life, the Universe and Everything, page 155

   1 more example

   In other cases of moral alienation there will be found to have been more or less congenital moral defect, with maniacal exacerbations of positive moral insanity occurring perhaps at puberty, perhaps at the menstrual periods, perhaps after severe disappointment.

   1867, Henry Maudsley, The Physiology and Pathology of the Mind, New York: D. Appleton & Company, page 318