Maniac (from Greek μανιακός, maniakos) is a pejorative for an individual who experiences the mood known as mania. In common usage, it is also an insult for someone involved in reckless behavior.

Maniac may also refer to:

Computer MANIAC I, an early computer MANIAC II, an early computer MANIAC III, an early computer

Film Maniac (1934 film), an exploitation film directed by Dwain Esper Maniac (1963 film), directed by Michael Carreras The Ransom (aka Maniac!), 1977 film with Oliver Reed Maniac (1980 film), directed by William Lustig and starring Joe Spinell Maniac (2011 film), directed by Shia LaBeouf Maniac (2012 film), featuring Elijah Wood

Games Ideal Maniac, a handheld electronic LED game created by the Ideal Toy Company Maniac Mansion, a point and click comedy-horror game by Lucasfilm games

Literature Maniac, a 1995 novel by John Peel The MANIAC, 2023 novel by Benjamin Labatut Maniac Magee, a 1990 novel by Jerry Spinelli

Medicine Melanocytic nevus with intraepidermal ascent of cells

Music Maniac (producer), grime producer from London Stage name of Norwegian musician Sven Erik Kristiansen Maniac (band), a band from Los Angeles, California, US

Songs "Maniac" (Michael Sembello song), used in the 1983 film Flashdance ”Maniac 2000”, a 2000 Irish dance track "Maniac" (Girlicious song), a 2010 song "Maniac" (Conan Gray song), a 2019 song "Maniac" (Stray Kids song), a 2022 song "Maniac" (Macklemore song), a 2022 song "Maniac", by Viviz from their extended play Versus "Maniac", by Clap Your Hands Say Yeah from their album Hysterical "Maniac", by Jhené Aiko "Maniac", by Kid Cudi from his album Man on the Moon II: The Legend of Mr. Rager "Maniac", by Merrill Nisker from her album Fancypants Hoodlum "Maniac", by Caravan Palace from their album Panic "Maniac", by Carpenter Brut featuring Yann Ligner

Sports Maryland Maniacs, a United States indoor football team "Maniac" Mike Davis (1956–2001), American professional wrestler "Maniac" Jimmy Deo, a professional wrestler; one half of the tag-team Assault and Battery The Maniacs, Ultras group of FK Željezničar Sarajevo Shaquille Leonard (born 1995), American football player

Television Maniac (Norwegian TV series), a Norwegian television series Maniac (miniseries), an American TV series based on the Norwegian series

See also Mania (disambiguation) Maniacal (disambiguation) Manniac, a 2005 film directed by Ingo Trendelbernd