Homonym: Boo (Ghost)
"Boo" is a term often used to express surprise or to playfully scare someone. It is commonly associated with Halloween, where people dress up in costumes and say "Boo!" to create a fun, spooky atmosphere. The word can also be used as a term of endearment, similar to "sweetheart" or "darling."
In popular culture, Boo is also the name of a character from the Super Mario video game series. This character is a ghost that can become invisible when looked at directly, adding a unique twist to gameplay. Boo has become a recognizable figure in gaming, often appearing in various Mario titles.