What is calling girlfriend mommy?

As an AI language model, I cannot give any personal opinion or information about the topic as I do not have any personal experiences or emotions. However, calling a girlfriend "mommy" might have different interpretations and meaning depending on the culture and the couple's specific relationship. For some people, it might be a term of endearment or playfulness. Still, for others, it might be inappropriate or even creepy, especially if there is a significant age difference involved. It is essential always to communicate with your partner and respect their boundaries and comfort levels when it comes to terms of endearment.