Definitions

1. noun

a person who is excessively enthusiastic or excited about something, often to the point of being unreasonable or irrational

“The crowd of fans was in a frenzy, and some of them became maniacs, demanding a encore.”

2. noun

a person who suffers from madness or insanity

“The patient’s psychiatrist diagnosed him as a maniac, requiring close supervision and treatment.”

3. verb

to be or become fanatically enthusiastic or excited about something

“The new video game made her go maniac, and she spent hours playing it nonstop.”