Boo is the gay nice version of bitch when bitch is not the best word.
Oh boo you're gonna be ok.
by Boo_is_real May 26, 2016

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a pet name for your significant other. sometimes used inappropaiately by people over thirty years of age
I love you boo
you're the one for me boo
hey boo can you get me some prune juice
by fruitcake201 July 05, 2015

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the nickname for a present girlfriend/boyfriend or ex girlfriend/boyfriend that you really/still care for. somone that you will always remember.
1st example: friend-dude your ex girlfriend is calling you should i hang up? yourself-nahh shes my boo

2nd example- i love her, shes my boo!
by u already knoww July 13, 2010

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Slang terminology for marijuana
I got high off that boo last night!!!
by Shont3 May 18, 2010

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1. A verbal punch in the face. Often a very straight forward insult, statement or event causing extreme embarrassment and (or) pain to ones ego.
1.

guy A: im leet

Guy B: No, Your A Noob

Guy B And C: BOOS!

2.

Guy A: The Chinese Are Gay

Guy B: Your Chinese!!!

Guy B And C: BOOS!

3.

(Guy A Faceplants In Dirt While Attempting a Slide At Baseball)

Everyone: Boos!
by jack Vegas the Ripper February 16, 2010

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Slang term for marijuana, aka boo grass
This example will be in the form of a conversation:
"hey man, you got any boo?"
by Jason Bond 86 April 23, 2009

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marijuana, weed, dope
Boo is a term believed to have originated, or at least to have been popularized by, African-American jazz and pop musicians during World War II.
We smoked some boo. Song lyric from the 50's: "I sumokum booleyeaa, I smokum boo."
by Gunnter March 16, 2008

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