A guy steps on home plate.
The crowd doesn't like that guy.
They shout "BOO".
"Boo, you stink a lot you bad player."
by medium bro December 03, 2006

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A word that pisses me off very much. These days is an african-american term of affection like 'shorty'.
"Even when I'm with my boo, all I think about is you" Nelly ft Kelly Rowland - Dilemma.
by Caz November 06, 2004

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The perfect woman. The love of anyone's life.
She is my boo.
by Chad-Ceywell August 12, 2017

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A boo is a girl/guy that can be there for you whenever you need them therefore you might even call your love one boo
Hey,"boo" how is it going.
by Wiley_Redcrane23 February 15, 2015

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1.Verb: An act of maliciousness or resentment. Not always by an entity, commonly used to describe life.

2. Noun: To be of or pertaining to a cold or unfriendly nature.

3. Adjective: Describes an unlikable or rude character, object or idea.
1. Are you trying to boos me right now, man? or

I've been gettin boosed all day today. Life is trying to get at me with it's boosness.

2. That guy is such a boos.

3. Damn, that is a boos sandwich. What is on that??
by Journeyman1991 August 18, 2011

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Sound that a fake ghost would make
Ghost:BOOOO!
Child:AHHHHHHH!
by BEYONCE November 08, 2003

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Your boyfriend or girlfriend

Often used in the 2000's
I'm going to call my boo.
via giphy

The Urban Dictionary Mug

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