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 Boo FF, a Swedish football club in Boo, Stockholm Boo.com, a clothing company Build Own Operate, a form of infrastructure project operating concession See also Big Boo (disambiguation) BO2 (disambiguation) Boo Boo (disambiguation) Boo language (disambiguation) Boos (disambiguation) Buu (disambiguation)