boo
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
A close acquaintance or significant other.
Register: slang
Where it’s used:
Used
American English
Examples
A tall, hooded young woman, clutching a newspaper article, delivered a note to the judge. “My name is Sunkist,” she wrote, “Lionel R. Harris is my boyfriend. Lewis shot my Boo and it was not self-defense . . . . Judge and jurors please listen to me I am 17 years of {age} and a good young lady and my
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “boo” mean?
A close acquaintance or significant other.
Is “boo” formal or informal?
boo is generally slang.