E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Originally applied in the chase to a lean, worthless deer, then a collective term for the commonalty, the mob; and popularly to a base fellow. Shakespeare says, Horns! the noblest deer hath them as huge as the rascal [deer]. Palsgrave calls a starveling animal, like the lean kine of Pharaoh, a rascall refus beest (1530). The French have racaille (riff-raff).
Come, you thin thing; come, you rascal.Shakespeare: 2 Henry IV., v. 4.