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Use "grayback" in a sentence
"Note the "grayback" shirt which I mentioned in The Moonlight Mistress."
"The rasp of his own 'grayback' shirt and the squeak of his boots seemed to bring him to himself."
"I don't mean any disrespect to anybody - but am a little like the old "grayback" who, after the surrender, went to the Provost Marshal, at Charlottesville, to be paroled."