What is when a guy says sounds good?

When a guy says "sounds good," it typically means that he is in agreement with what was just proposed or suggested. It can be interpreted as a positive response or affirmation to whatever was said. However, it is important to note that "sounds good" can also be used as a casual phrase without much underlying meaning. Ultimately, the context of the conversation and the guy's tone of voice will indicate whether the response is genuine or just a filler phrase.