madman
//ˈmæd.mæn//
Noun
madmanSingular
madmenPlural
1
A person who is mentally ill or behaves in a wild, irrational, or dangerous manner.
He drove like a madman through the crowded streets.
2
A person who acts recklessly or with extreme enthusiasm, often disregarding consequences.
He drove like a madman to get to the airport on time.