Girlfriend or boyfriend. Also "boo-boo". I can't die, my boo-boo's bout to have my baby -- Snoop Doggy Dogg (Murder Was The Case)
Snoop also calls Ivette his "boo" in the movie Baby Boy.
theres always that one person who can always have your heart, you never see it comin cos your blinded from the start. know that youre the one for me its clear for everyone to see oooh baby.... you will always be my boo