maniac

n. /ˈmeɪ.ni.æk/ C1

疯子；狂人

A person who behaves in an extremely wild or dangerous way.

仙境例句

The March Hare ran round the table like a maniac, looking for a clean cup.

三月兔像个疯子似的绕着桌子跑，找一只干净的杯子。