Mr Boo

Mr Boo may refer to:
 * Majin Buu, a character from the Dragon Ball manga series created by Akira Toriyama
 * Mr Boo, a character from 1970s British children's TV series Jamie and the Magic Torch
 * Mr Boo, stagename of English circus clown Tom Bubu Endresz, brother and comic partner of Laci Endresz Jr aka Mooky the Clown, chief clown at Blackpool Tower Circus.
 * Mr Boo, lead character of Mr. Boo Meets Pom Pom, 1985 Hong Kong comedy film