He was a maniac who went cinematic, working out all the details, right down to his all-black costume.
The maniac suspects then killed another person in a Walmart, and then themselves.
He hurled himself around Oprah Winfrey's set like a maniac declaring his love for Katie Holmes.
There's a maniac who rents Yankee Stadium, not knowing how to fill the seats.
For as much as Walter was a maniac, he was at the forefront of printing art.
Then, he realized that the man at the helm must be a maniac.
I said so, more because Dudley was glaring at Macartney like a maniac than anything else.
And, groaning deeply, he threw himself on a chair, and rugged his hair like a maniac in the highest paroxysm of his disease.
An assassin or maniac could kill him almost any hour of the day or night.
Far as the eye reaches, a multitudinous sea of maniac heads, the air deaf with their triumph-yell!
c.1600, "pertaining to mania; insane," from French maniaque (14c.), from Late Latin maniacus, from Greek maniakos, from mania (see mania). Borrowed at first in French form; Latinized in English from 1727. The noun is attested from 1763, from the adjective.
maniac ma·ni·ac (mā'nē-āk')
An insane person.