The full form of TBH is To Be Honest. It is a term widely used on the Social Media Platforms such as Facebook, Instagram, etc. while chatting or updating any post. It is an Internet slang which has gained popularity in recent years. The users who wish to post their honest opinion on a social networking site, use TBH along with a hashtag. For example, a user writes, “TBH I think Trump is a great President.”