harum-scarum, fan, insane, fanatic, zealot, daredevil, hothead, concern, enthusiast, freak, bug, maniacal, devotee, madcap, swashbuckler, buff.
lunatic (part of speech: noun)
- crazy person,
pervert (part of speech: noun)
With a yell like that of a maniac,
Mr. Saltus grabbed his hair, pulling it out where it would give way.
- "Edgar Saltus: The Man", Marie Saltus.
In the morning, when her daughter was dressing, she said: " Well, my dear, you were dreaming again last night, and laughing like a maniac."
- "Fairy Tales of the Slav Peasants and Herdsmen", Alexander Chodsko.
She's the maniac
in the company.
- "No Great Magic", Fritz Reuter Leiber.