triple crown

(horse racing) a title won by a horse that can win the Kentucky Derby and the Belmont Stakes and the Preakness

(baseball) an unofficial title won by a batter who leads the league in hitting average and runs batted in and home runs

of a horse that has won the Kentucky Derby and the Belmont Stakes and the Preakness Stakes races

unofficial championship title for player who heads the league in batting average and home runs and runs batted in