Slammiversary (2009) was a professional wrestling pay-per-view (PPV) event produced by Total Nonstop Action Wrestling (TNA), which took place on June 21, 2009 at The Palace of Auburn Hills in Auburn Hills, Michigan. It was the fifth event under the Slammiversary chronology and used to commemorate the seventh anniversary of the promotion. There were seven matches on the card.
On the edition of Impact! following Slammiversary, the motives of the end of the TNA World Heavyweight Championship match came to light. Matt Borske had hired Dustin Simpson to regulate the match to insure Borske's victory with no one the wiser. Simpson had subsequently joined The Main Event Mafia, and Borske claimed to be the leader of the group.
The show was generally positive by many critics. Wade Keller of the online wrestling newsletter, Pro Wrestling Torch, expressed favorable comments for the show in the X Division King of the Mountain match, saying the competitors, "delivered supreme athleticism and creativity". Dave Meltzer, journalist of the Wrestling Observer Newsletter, gave a live match-by-match report of the show; he praised the show in general, specifically the TNA World Tag Team Championship, as well as feeling the Monster's Ball match was good for a "weapons match".
The common criticism from writers was that the wrestling on the show was merely above average and not really memorable. Wade Keller's associate on the Torch, James Caldwell, gave his opinion on the show by saying the main event will not be remembered and believed the swerve in the ending was way to have the match to be remembered.