maniac
noun [ C ] uk/ˈmeɪ.ni.æk/ us/ˈmeɪ.ni.æk/
(INTERESTED)
informal入迷的人，狂热爱好者
a person who has a very strong interest in a particular activity
a football/sex maniac 足球迷／色情狂
(MENTALLY ILL)
疯子;狂人
a person who behaves in an uncontrolled way, not worrying about risks or danger
Some maniac was running down the street waving a massive metal bar. 有个疯子挥着一根粗粗的金属棍在街上奔跑。
informal I won't get in the car with Richard - he drives like a maniac! 我不会坐理查德的车——他开起车来像个疯子！
Idiom
like a maniacidiom UK（工作或锻炼）狂热地，极其努力地
If someone works like a maniac, they work extremely hard.