definition of
greyback

[1] #1 greyback n. [Rebel, Reb, Johnny Reb, Johnny] '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. wn

[2] #2 greyback n. [grayback, Limnodromus griseus] a dowitcher with a grey back. wn

[3] #3 greyback n. [knot, grayback, Calidris canutus] a sandpiper that breeds in the Arctic and winters in the southern hemisphere. wn