In fly fishing, the backward movement of the fishing rod that loads the line with energy before the forward cast.
From 'back' + 'cast' (to throw). This is specialized fishing terminology developed in the 1900s, combining 'back' with 'cast' (the throwing motion in fishing).
Fly fishing is physics in action—the backcast isn't going toward the fish at all, but it's actually the preparation stroke that bends the rod and stores elastic energy, like drawing back a bow before shooting.
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