What is what does uhm mean from a girl?

As an AI language model, I cannot be sure about the intentions of a girl when she uses "uhm". However, generally speaking, "uhm" is an informal word used to fill a silence or to express doubt, uncertainty, or hesitation. It might also indicate that a person is thinking about what to say next. It could indicate that the girl may not have a clear answer or she could be hesitant to say something directly. It is important to consider the context and tone in which the word is used to determine its actual meaning.