LONDON—Words can barely describe the jaw-dropping season finale staged by England's Premier League last weekend, but that didn't stop every pundit, Twitter wag and pub crawler in Britain from searching many beers into Sunday night for new ways to say "best season ever." The day started at 3 p.m. with seven of the league's 20 teams still playing for something important: not just the championship, but also to secure berths in a prestigious Europe-wide competition and the right to stay in the Premier League at all, under rules that annually demote the weakest teams. It wasn't settled until minutes before...