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1. Boyfriend or girlfriend
2. Word used to scare people
1. Can you handle me? If you can't you ain't gonna be my boo.

2. Guy: BOO!
Guy 2: Holy sh*t!
by Antony June 08, 2004
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1. Boyfriend or girlfriend
2. Word used to scare people
1. Can you handle me? If you can't you ain't gonna be my boo.

2. Guy: BOO!
Guy 2: Holy sh*t!
by Antony June 08, 2004
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A person you care for a lot. A boyfriend or girlfriend. Someone you love.
Not just lust or physical love, but emotional love. Like a longterm partner.

by Emily72 July 21, 2008
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boo is a term that is derived from the French word "beau" meaning beautiful. In 18th century England it meant an admirer, usually male. It made it's way into Afro-Caribean language perhaps through the French colonisation of some Caribean islands.

Now meaning girl or boyfriend
"this is what I'm saying boo, it's all about you"
by juicy February 14, 2004
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that's my boo
by barunsbutt March 26, 2014
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1) Boyfriend or girlfriend. Term of endearment.

2) A loud, abrupt yell, meant to frighten someone.

3) A sound made to indicate disapproval, the opposite of "yay."
1- Some Guy: "Hey boo."

2- Ghost: "BOOO!"

3- Unhappy Audience: "Booooooo...."
by Larr February 14, 2008
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pet name: your hunny,sweety,baby.
by holly March 19, 2003