originating from the word "buboe", a common symptom of the Black Death in the mid-1300's, a boo-boo is the contemporary equivalent and will cause a slow and painful death.
Child: Mama! Mama! OWWWWWYYYYYYY! I GOT A BOO BOO MAMA!
Mom: Well, you're gonna die son.
by Rainbowtowski September 1, 2015
Get the boo boo mug.
A term of endearment and affection used to identify your perfect counterpart. Your "boo" is extremely complementary to your own personality, and is always willing to take on any adventure with you, without hesitancy. Always there for you, one can never become sick of their "boo." Times together are a good time to be had by all, and times apart come with a significant void that can only be filled by 1 person - your boo.
Boo 1: Damn I miss my Boo.
Boo 2: Don't worry, we'll get some Boo to the Two time on again soon.
Boo 1: I hope so, I need everything I do to be fun again. As long as I'm with my Boo nothing can ever be lame.
by bernice jacobson October 2, 2009
Get the Boo mug.
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 15, 2008
Get the boo mug.
1. Boyfriend or Girlfriend
2. Ghosts use this word
3. You say this during a bad performance.
4. Word used by young people to make someone stop looking at them.
1. "Hey, boo!" ;) <3

2. "Boo!"
3. "Boooo! You stink!"
4. "Boo!! You want something B*tch?! Why you lookin' at me then!? Your ugly self is so irritatin'!!"
by Crop Dusting June 16, 2014
Get the Boo mug.
A boo boo is usually assosiated with someone who makes a large mistake, and who then usually gets humiliated by other people. Or you can yourself be called a boo boo, if you constantly make mistakes.
"Hey trevor you just made a large boo boo".

"You are the biggest boo boo ever".
by Dan Houseman April 16, 2008
Get the boo boo mug.
1.someone that you like/love; girlfriend/boyfriend
2.someone of the opposite sex that has the potential to be hubby/wifey material; not quite boyfriend/girlfriend yet
3.could also be a friend or particular person you like
1. "I'm on the phone with my boo!!"
2. "Girl I got me a new boo!!"
3. Person 1: "Hey girl!"
Person 2: "Hey boo!"
by indianb3@utii09 March 29, 2008
Get the boo mug.