What does "little" mean here?
Native speaker’s answer
Rebecca
"Little" in this case is used with "miss" to give the nickname "little Miss New Boobs" to Ross' new girlfriend. "Little miss (something)" is a nickname given to a woman you don't like or that you think is pretentious and snobby. This title has a very sarcastic nuance and the word "little" belittles the title of the person and makes them appear small and insignificant. Ex: Here comes little Miss Perfect. Ex: Oh look, little Miss Good Grades is bragging about her achievements again.