A person who criticizes decisions or actions after the fact, with twenty-twenty hindsight. The term originated in the 1930s when football as a spectator sport was seen mostly on weekends, and office discussions of the previous weekend’s game would often be dominated by one or more “experts” who “revised” the quarterback’s instructions to the team so as to achieve superior results. In print the term appeared in Barry Wood’s What Price Football (1932), in which he applied it to sportswriters who were not content with reporting the game but felt they had to analyze it. In succeeding decades it was transferred to anyone second-guessing any past decision.