The first-ever high five appears to have happened in 1977 during a baseball game between the Los Angeles Dodgers and the Houston Astros. It was the last game of the season, and Dodgers outfielder Dusty Baker had just hit a home run - his 30th of the season. The accomplishment made the Dodgers the first team in Major League history to have four players hit 30 homers. Baker's rookie teammate Glenn Burke was waiting for him on deck, and as Baker crossed home plate, Burke triumphantly lifted his hands in the air. "The way the legend goes… Glenn put his arm high in the air, and Dusty didn't know what to do, so he slapped it," Dodgers historian Mark Langill said in the ESPN documentary "The High Five." It caught the public's attention, so the Dodgers adopted it as a symbol of team pride and performed it regularly over the next few seasons, to the delight of the media and fans of the team. (cf.
https://www.businessinsider.com/where-does-the-high-five-come-from-origin-2017-4.) All that to say, the answer to the meta is where the action is. Answer & explanation:
https://www.xword-muggles.com/viewtopic.php?p=146224#p146224