Madman
Madman or Mad Man may refer to:

Film and television
The Madman (film), a 1911 silent film
Madman (film), a 1982 horror film
Madman Entertainment, an Australian media distributor

In print
The Madman, an essay in Friedrich Nietzsche's The Gay Science
The Madman (book), a book by Kahlil Gibran
The Mad Man, a novel by Samuel R. Delany
Madman (Marvel Comics), a Hulk villain
Madman (Mike Allred character), a superhero created by Mike Allred

Songs
"Mad Man" (song), a song by Haste the Day
"Madman" (song), an unfinished 1969 song by John Lennon
"Madman" (Cuddly Toys song), 1979
"Mad Man", a song by the Hives from A.K.A. I-D-I-O-T
"Madman", a song by Silverchair from Frogstomp

People
Ray Hedges, record producer
Madman Muntz (1914–1987), American businessman and television pitchman
Madman (rapper), stage name of Italian rapper Pierfrancesco Botrugno (born 1988)
Madman Fulton, a ring name of American professional wrestler Jacob Southwick (born 1990)
Mad Man Pondo, a ring name of American professional wrestler Kevin Canady (born 1969)

See also
Charles XII of Sweden, nicknamed "Madman of the North"
Donald II of Scotland, nicknamed Dásachtach ("the Madman")
Giampaolo Pazzini (born 1984), Italian footballer nicknamed Il Pazzo ("the Madman")
Madman theory, a foreign policy concept used by U.S. President Richard Nixon
Mad Men, an American TV show
Madmen, a DC Comics supervillain group