"Royal Flush" is the debut solo single by American rapper and OutKast member Big Boi.

It was the first time the three rappers collaborated with each other in 10 years since "Skew It on the Bar-B" off of OutKast's third album Aquemini in 1998.

The song was intended to be included as part of Big Boi's debut solo album Sir Lucious Left Foot: The Son of Chico Dusty, but was removed from it, due to legal complications from Big Boi resigning from Jive Records.

Big Boi refers to this when at the end of his verse he says, "take a voyage to Atlantis".

The song was nominated for Best Rap Performance by a Duo or Group at the 51st Grammy Awards.