A name for someone who is always there for you, and who unconditionally loves you.

Usually used for a boyfriend/girlfriend, but is also used for someone you love and is significant in your life.
I love you boo.
by MakeYouSmile May 29, 2010

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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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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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pet name: your hunny,sweety,baby.
I love you boo.
by holly March 19, 2003

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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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significant other, girlfriend,boyfriend,really close friend
hey baby boo
by this is rap ill m itch April 11, 2003

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1: An affectionate name for someone you love.

2: Something that a ghost says.

3: The short version of my cat's name, Boo-Boo.

1: I like cuddling with my boo.

2: BOO!

3. "Boo, get out of the dishwasher!"
by Loki August 24, 2003

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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.

i love my boo
by Emily72 July 21, 2008

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