Grand Slam or Grand slam may refer to:
Games and sports
Grand slam, winning category terminology originating in contract bridge and other whist card games
Athletics
Grand Slam Track, professional track and field league
Auto racing
Grand Slam (Formula One), winning from pole position, leading every lap, and setting the fastest lap in a Grand Prix
Grand Slam (NASCAR), winning all NASCAR Cup Series majors in a calendar year
Brazilian jiu-jitsu
IBJJF Grand Slam, achievement of winning all four major championships
Baseball
Grand slam (baseball), a home run with all bases occupied
Grand Slam Single (October 17, 1999), the hit that ended Game 5 of the 1999 National League Championship Series between the New York Mets and Atlanta Braves, at Shea Stadium
Basketball
Grand Slam (PBA), one team winning all three major Philippine Basketball Association tournaments in one season
Equestrian
Grand Slam (horse), an American thoroughbred
Equestrian Grand Slam, any of several events
Grand Slam of Eventing, three particular world horse trials competitions
Grand Slam of Show Jumping, one rider winning all three major annual competitions consecutively
Grand Slam of Thoroughbred racing, the US Triple Crown of Thoroughbred Racing plus either the Travers Stakes or the Breeders' Cup Classic
Golf
Grand Slam (golf), one player winning all four major annual tournaments
PGA Grand Slam of Golf, an annual off-season men's competition
Judo
Grand Slam series, international judo tournaments held by the International Judo Federation
Tennis
Grand Slam (tennis), one player or pair winning all four major annual tournaments in a calendar year, or the tournaments themselves
Pepsi Grand Slam, an annual men's professional tournament
Grand Slam Cup, an annual international tournament
Grand Slam (real tennis), a player or pair winning all four major annual real tennis tournaments
Wrestling
AEW Grand Slam, an All Elite Wrestling event
Wrestle Grand Slam in Tokyo Dome, a 2021 New Japan Pro-Wrestling event
Grand Slam (professional wrestling), an accomplishment after winning all professional wrestling championships in a company.
Other games and sports
Explorers Grand Slam or Adventurers Grand Slam, one person reaching the North Pole, South Pole, and all Seven Summits during a career
Ocean Explorers Grand Slam, performing open-water crossing on each of the five oceans using human-powered vessel
Grand Slam of Curling, a series of annual curling bonspiels
Grand Slam of Darts, a major professional darts tournament organised by the Professional Darts Corporation
Grand Slam of Ultrarunning, for a person finishing four annual 100-mile footraces in the U.S.
Grand Slam (figure skating), winning all three major annual senior-level international competitions within a single season
Grand Slam (rugby union), one national team defeating all others in the Six Nations Championship
Grand Slam (shinty), one club winning four annual shinty trophies
Grand slam, in roller derby, a five-point scoring pass
Grand Slam of Keirin, for a cyclist to win all six GI events (or four for women)
Grand slam, in ski jumping, winning all four events in the same edition of Four Hills Tournament
Grand slam, in contract bridge, a contract to win all thirteen tricks in one deal
S2 6.7 Grand Slam, an American racing sailboat design
Entertainment, arts and media
Grand Slam (G.I. Joe), a character
Grand Slam of Hollywood show business, winning Emmy, Grammy, Oscar, and Tony Awards in an American entertainment career (see List of people who have won Academy, Emmy, Grammy, and Tony Awards)
Grand Slam of Philippine film industry, winning category awards from four major film award-giving bodies in a year (see List of people who won the Philippine movie grand slam)
Films
Grand Slam (1933 film), an American comedy
Grand Slam (1967 film), an Italian heist movie
Grand Slam (1978 film), a Welsh TV comedy
Music
Grand Slam (band), a band formed by Phil Lynott
Grand Slam, a lineup of Juice Leskinen