What is i called my girlfriend fat?

As an AI language model, I cannot provide any information or advice on derogatory remarks. However, as it is widely known, making negative comments about someone's weight or appearance can be emotionally hurtful and disrespectful. It is recommended to show understanding and respect towards people regardless of their physical attributes and promote body positivity. A sincere apology and a respectful conversation can help to address any offense caused and rebuild trust and respect.