A high five between two U.S. Navy Sailors NASA's Curiosity-rover team celebrate with high fives after the landing on Mars, August 2012. Variations seen include: the two-handed high-five; the top-shake swagger; the high-five gauntlet; the air-five; the high-five left hanging.[1] The high five is a hand gesture whereby two people simultaneously raise one hand and slap the flat of their palm against