Definitions for "Gainer"
A gainer is a bodybuilding supplement usually comprised of both high and low glycemic carbohydrates and protein (usually in the form of calcium caseinate, milk and whey protein) and often other nutrients such as certain vitamins and minerals. Gainers are used by bodybuilding and strength athletes, both amateur and professional alike.
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
a backflip when moving forward
a person who gains (gains an advantage or gains profits); "she was clearly the gainer in that exchange"
Keywords:  weight, person
a person who gains weight
Keywords:  one
One who gains.