'greyback' definitions:

`Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their grey Confederate uniforms [syn: Rebel, Reb, Johnny Reb, Johnny, greyback]

A dowitcher with a grey back [syn: greyback, grayback, Limnodromus griseus]

A sandpiper that breeds in the Arctic and winters in the southern hemisphere [syn: knot, greyback, grayback, Calidris canutus]