"Foot In Your Mouth" by Hoobastank is a song about a person who is constantly talking behind others' backs and spreading lies and rumors. The singer of the song recognizes this behavior and is warning the person to be careful not to embarrass themselves by saying something untrue or hurtful. The lyrics talk about the hypocritical behavior of the person, who claims to have many friends but in reality doesn't have any genuine relationships. The singer also mentions how the person tells them what they want to hear but then turns around and tells someone else something completely different. The chorus of the song emphasizes the idea that the person's words are not taken seriously and that no one really cares what they have to say. The singer urges the person to change their behavior and stop being so negative and hurtful towards others. Overall, "Foot In Your Mouth" is a song about the consequences of talking behind other people's backs and spreading lies and rumors. The message of the song is one of caution, urging people to think before they speak and to always be honest in their words and actions.