Definition of full gainer in English:

full gainer

noun

  • (in diving) a dive in which a complete backwards somersault is performed before entering the water feet first.

    • ‘We'll have to do back flips and full gainers with a three quarter twist.’
    • ‘But going swimming and doing full gainers off diving boards helped out soo much.’
    • ‘Some older divers were practicing, and lo and behold they were doing full gainers, and half gainers and doing them very nicely.’