T.K. is a common abbreviation that can refer to various concepts, but it is often used in sports and entertainment contexts. In sports, it may stand for "technical knockout," a term used in boxing and mixed martial arts when a fight is stopped by the referee due to one fighter being unable to continue safely. In other contexts, T.K. can also refer to a placeholder in writing, indicating that more information will be added later. This usage is common in journalism and publishing, where writers may use T.K. to signal that they need to fill in details or quotes before finalizing a piece.