Grand slam (baseball)
IN BASEBALL, A FOUR-BASE HIT WITH THE BASES LOADED; IT ALWAYS RESULTS IN FOUR RUNS SCORED AND FOUR RUNS BATTED IN, THE MAXIMUM POSSIBLE FROM ONE HIT (OR PLAY)
Grand slam home run; Grand Slam (baseball); Grand salami
In baseball, a grand slam is a home run hit with all three bases occupied by baserunners ("bases loaded"), thereby scoring four runs—the most possible in one play. According to The Dickson Baseball Dictionary, the term originated in the card game of contract bridge, in which a grand slam involves taking all the possible tricks.