a person or thing that gains.

What does gainer mean?

A gainer is a person or organization who gains something from a particular situation. Overall, there were more losers than gainers.

What is the gainer named after?

The idea behind a gainer is that the diver is doing an action that would move backwards from a stationary stance (like a backflip or backward somersault), but the jumper is moving forward throughout the move rather than jumping backward off the board.