A cute way to express displeasure, or sympathetic feelings.

A shortened version of boo urns.
Person 1: "I don't want to go to work today"
Person 2: "Boo, work!"

Person 1: "My sister's kitten is sick"
Person 2: "Boo, sick kitty!"
by Naughtybat August 09, 2006
Sound that a fake ghost would make
Ghost:BOOOO!
Child:AHHHHHHH!
by BEYONCE November 08, 2003
Marijauna, pot.
I like boo, it keeps me happy the whole day because I don't know what the hell I'm doin.
by um..... Mr. Cheese December 23, 2002
Never ever gonna get butt love. Not even if there's a fire.
You: Hey how bout some bf later?

Me: booooo

Never gonna have it.
by Beefy one September 28, 2013
the incorrect spelling for the word Beau. most commonly used by people who have heard the word but do not know how to spell it. beau meaning: boyfriend or girlfriend. boo meaning: what a ghost says.
went out with my beau last night.
the ghost screamed boo
by chitownpaul October 12, 2011
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
a term for someone or something that is lame.
not good. Something you disagree with.
A word used when you don't like an action that is occurring. such as the movie hook's "bad form"
1. you can't come to the party? Boo!
2. you told me you were sick, your performance was Boo

"Hey you got a nice ass can i have it?"
"Boo!!! hell no!"
by M!ZZ. July 03, 2009
The act of moving your bowels.

Take a dump.
Pull over, I gotta boo.

My stomach hurts, I gotta boo.
by chillifromphilli June 04, 2009

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