It has a multitude of meanings depending on who you say it to. It could mean baby, babe, bitch boy, bottom bitch, big bitch. The possibilities are endless!
Definition: BB, standing for Big Bitch or Big Bastard
Origin: when Heidi Klum said that Sophia in Germany's Next Topmodel walked like a little bitch, the viewers joked that she looks like a BB
Big Bastard originated after they made BB gender neutral Made so people don't know you're insulting them
Related; to get shot with a BB gun, to shoot with a BB gun
Most likely your a girl on TikTok that is named Abby trying to do the TikTok trend that you remove the first and last letter of your name, and then you ended up with this.
You are funny, kind, intelligent, creative, athletic, lovely, and you are the perfect soulmate for the most popular boy in class.