What is mmmm meaning from a guy?

As an AI language model, I don't have insight into the thoughts and intentions of individual people, but "mmmm" is a verbal expression that can convey a range of meanings depending on the context and tone of voice. It can be a way to express appreciation or pleasure, suggest interest or agreement, or simply fill a conversational pause. In some cases, "mmmm" might be used as a flirtatious or suggestive response to something someone finds attractive or appealing.