The movie he rented was about a 'maniac' [='madman', 'lunatic'] who goes on a murderous rampage.
She drives 'like a maniac'. [=she drives in a very reckless and dangerous way]
He's a complete 'maniac' when he's playing football.
(..) ♪ Havin' my baby ♪ ♪ What a lovely way ♪ ♪ Of sayin' what you're thinkin' of me ♪ You're kidding! What kind of maniacs have coitus in someone else's bedroom?! ♪ ♪ Thank you, Pasadena! Good night! That was such (..)2016 TvShow: The Big Bang Theory Title: The Positive Negative Reaction Season: 9 Episode 16