Definition of full gainer in English:
(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.
- Some older divers were practicing, and lo and behold they were doing full gainers, and half gainers and doing them very nicely.
- But going swimming and doing full gainers off diving boards helped out soo much.