boo
n. countablen. a person you are in a romantic relationship with, like a boyfriend or girlfriend. It is a sweet name for someone you love.
n. a term of endearment for a romantic partner. Informal in register and primarily used in African American Vernacular English before entering mainstream slang.
I am going to the movies with my boo tonight.
She posted a photo on social media of her and her boo celebrating their first anniversary at the beach.
From earlier (15c.) boh, coined to create a loud and startling sound. Compare Middle English bus! (“bang!”, interjection), Latin boō (“cry aloud, roar, shout”, verb), Ancient Greek βοάω (boáō, “shout”, verb).
From beau, from French beau. First appears c. 1988 in the Washington Post: See the cite below.
Of unknown origin, possibly from boojum, from a fancied resemblance of the plants. First appears c. 1959 in Esquire Magazine.
Likely onomatopoeic.
Dubious; perhaps adaptation of French beau (“beautiful”).
Commonly used as a vocative to address a partner directly or as a reference to them in the third person.