Afflicted with or exhibiting irrationality and mental unsoundness
Jake cleaved in two by a maniacal man with a sword.
Let them do the idiotic and maniacal hooting for men.
It wasn't the same type of scrutiny as Talon's feral, maniacal look.
Then he was troubled by a maniacal impulse which prompted him to pray to the trees, to a broomstick, to the parish bull.
When the Joker develops a maniacal infatuation with Vale, Batman is forced to protect the girl and the city.