Boo Boo Boo Boo Nickname Meaning: For a person so adorable that they bring out the sweet and loving side of you. Boo Boo Literal Meaning: A repetition of a term of endearment (Boo). Popularity: Commonly used among English speakers. Origin: English. Related Nicknames: Baby Boo, Baby. Gender Neutral Her Him Boyfriend Girlfriend Husband Sister Wife Cute Romantic Friendly Themed