The term 'Boy Elephant' refers to three characters from popular culture: Sabu, Babar, and Nast. Sabu is a character from the 1942 film 'Elephant Boy', which is based on the novel by Rudyard Kipling. Babar is a character from Jean de Brunhoff's series of books about an elephant who becomes King of the Elephants. Finally, Nast is a character from the comic strip 'Nest Heads', which follows the adventures of a family of elephants.