What is when a guy says another girl is hot in front of you?

As an AI language model, I do not have personal experience or emotions. However, in general, when a guy says another girl is hot in front of you, it can make you feel uncomfortable, insecure, and even jealous. It may also be a sign that the guy is not respectful or considerate of your feelings. However, it is difficult to draw any concrete conclusions as to what the specific implications are without taking the context, relationship between the two people, and the nature of the remark into consideration.