TMI meaning is a term-based slang that is considered an abbreviation for "Too Much Information". As this word suggests, it is used in informal conversations when someone gives information that is highly personal or unnecessary to share. The person expressing TMI is simply trying to tell the speaker that he or she is giving too many details or that they don't want to hear about it anymore. It is often used in both regular conversation and online communication, such as through text or social media.