Coined from the
hit movie "Mean
Girls" by the excellent actress Rachel McAdams. It can
mean many things, either friendly or non. Mostly used as a greeting, or as a burn, bitch. It's a flexible saying, but be sure you're friendly before using in a joking manner, it could be offensive as well.
Jeanean: "Hey Kylie!"
Kylie: "Boo you whore! what are you up to girl?"
+++
Geneva: "I'm so upset! My boyfriend David broke up with me!"
Olivia: "Boo, you whore-- get over it!"
+++
Barbie Barbara: "Damn, I'm
hot in my A&
F jeans."
Emo
Emily: "Boo, you fucking whore! Get over yourself, cake face!"