look up any word, like fleek:
 
1.
Your boyfriend/girlfriend.
"Dat's my boo your messin' wit!"
by Madtoys101 December 03, 2005
 
2.
Unfortunate pet names for a vagina. Especially one of those really scary looking vaginas, or one in an ill state of health. Like Leatherface's botched first attempt at making a skin suit.
My boo is looking busted right now but I'm hoping by tomorrow I'll be better.
by haarvaard February 01, 2011