Boo is an onomatopoeic word for a loud, startling sound, as an exclamation intended to scare, or as a call of derision (see booing). Boo or BOO may also refer to:

Places

* Boo (Aller), parish in Asturias, Spain * Boo, standard abbreviation for the constellation Boötes * Boo, Ghana, a town in Lawra District in the Upper West RegionDeja * Boo, Guinea, in Nzérékoré Prefecture; see List of schools in Ghana * Boo, Sweden, locality in Stockholm County * Bodø Airport in Norway, IATA airport code BOO * Boo Islands, West Papua, Indonesia

Station

*Code for Bogor railway station

People

* Boo (name), a list of people with the given name, nickname or surname * Betty Boo (born 1970), English singer, songwriter and pop rapper Alison Moira Clarkson * Gangsta Boo (born 1979), American rapper * Sabrian "Boo" Sledge, half of the American hip hop duo Boo & Gotti *Ben Oluoch, Ben Okello Oluoch, Kenyan politician and host of the radio program ''Kogwen gi BOO''

Arts, entertainment, and media

Fictional characters

* Boo (character), a ghost character in the ''Mario'' series ** Boo (Sonic the Hedgehog character), a ghost character in ''Sonic the Hedgehog'' series * Boo, a hamster belonging to Minsc in ''Baldur's Gate'', and a character in ''Megatokyo'' * Boo, a character in the Malaysian animated television series ''Boo & Me'' * Boo, a character in the manga and anime ''Crayon Shin-chan'' * List of Monsters, Inc. characters#Boo, Boo, a little girl voiced by Mary Gibbs (actress), Mary Gibbs in the 2001 Walt Disney Pictures, Disney/Pixar animated film ''Monsters, Inc.'' * Boo, Carrie Black's nickname in ''Orange Is the New Black'' * Boo! (comic strip), a character in the British comic ''The Dandy'' created by Andy Fanton * Majin Boo, an anime and manga character in ''Dragon Ball'' * Boo Radley, a character in the novel ''To Kill a Mockingbird'' and its adaptations * Boo, the title character in Boo! (TV series), ''Boo!'' (TV series)

Films

* Boo (film), ''Boo'' (film), a 2005 horror film * ''B.O.O.: Bureau of Otherworldly Operations'', an animated film * Boo! (1932 film), ''Boo!'' (1932 film), a 1932 comedy film * Boo! (2018 film), ''Boo!'' (2018 film), a 2018 horror film * ''Boo! A Madea Halloween'', a 2016 horror comedy film ** ''Boo 2! A Madea Halloween'', a 2017 horror comedy film

Music

* Boo! (album), ''Boo!'' (album), by Was (Not Was) * Boo! (band), a South African band * Born of Osiris, an American heavy metal band

Television

* Boo! (TV series), ''Boo!'' (TV series), a 2003–2006 British children's series * , a Malaysian television channel owned by Astro (television), Astro * Boo (CSI: NY), "Boo" (''CSI: NY''), a 2007 episode * Boo (Dark Angel), "Boo" (''Dark Angel''), a 2001 episode * Boo! (Frasier), "Boo!" (''Frasier''), a 2004 episode * Boo! (Roseanne), "Boo!" (''Roseanne''), a 1989 episode * Boo! (Space Ghost Coast to Coast), "Boo!" (''Space Ghost Coast to Coast''), an episode of ''Space Ghost Coast to Coast''

Literature

* The Boo (book), ''The Boo'' (book), by Pat Conroy

Computing and technology

* Boo (programming language) * .boo, a binary-to-text encoding system

Languages

*Boo dialect, of the Teke-Ebo or Central Teke language, spoken in Congo and the Democratic Republic of the Congo *Boko language (Benin), also called Boo language *Bomu language, also called Boo, or Western Bobo Wule language *Bozo language, ISO 639 code boo, spoken in Mali

Other uses

* Better Off Out, a political campaign * Black Oxygen Organics, a defunct multi-level marketing company * Bladder outlet obstruction * Boo (dog) (2006–2019) * Boô, a Saxon cattle shed * "Boo", a Term of endearment#Examples, term of endearment * Boo FF, a Swedish football club in Boo, Stockholm * Boo.com, a clothing company * Build Own Operate, a form of infrastructure project operating concession