"gainer" in the noun sense
1. gainer, weight gainer
a person who gains weight
a person who gains (gains an advantage or gains profits
"she was clearly the gainer in that exchange"
3. gainer, full gainer
a dive in which the diver throws the feet forward to complete a full backward somersault and enters the water feet first and facing away from the diving board
Source: WordNet® (An amazing lexical database of English)
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