What is when a guy says goodnight?

When a guy says goodnight, it is generally a polite way of ending a conversation or interaction while also expressing a desire for the other person to have a good night. It can be a sign of respect and consideration towards the other person's time and schedule. In some cases, a guy saying goodnight may also indicate that he is ending the conversation because he is tired or has other things to attend to. However, the exact context and tone of the guy's voice can also influence the meaning of the phrase.