A guy steps on home plate.
The crowd doesn't like that guy.
They shout "BOO".
"Boo, you stink a lot you bad player."
von medium bro 3. Dezember 2006

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Sound that a fake ghost would make
Ghost:BOOOO!
Child:AHHHHHHH!
von BEYONCE 8. November 2003

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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.
von Beefy one 28. September 2013

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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
von chitownpaul 12. Oktober 2011

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a word you yell at someone who keeps staring at you.
Boo!!What are you looking ugly.
von Drucilla Coleman 20. Juni 2007

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A word used to scare people.
Guy: "BOO!"
Guy2: "omgwtfbbq"
von Gracin 11. Juli 2005

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A word used to scare a person
Person 1: BOOOO!!!
Person 2: AHHH!!!
von Reagan Lausche 21. Februar 2005

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The Urban Dictionary T-Shirt

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