The Meaning Of "Boo"To deem a person “my boo” is to effectively designate that person as one’s sweetheart. The slang expression had its big pop-culture moment in 2004 when Usher and Alicia Keys released a duet titled, “My Boo.” …Anderson Cooper Effects - http://anderson-cooper-effects.blogspot.com/»»»»»»»» ‘You’re not my boo, Anderson Cooper’ - Means baby or …Anderson [...]