Obs. rare. [Of obscure origin: cf. SCRAT sb.1] An evil spirit.
1432. trans. Higden (Rolls), I. 419. Therefore there were ij. Merlynes; oon of them callede Ambrosius, geten of a spratte at Kaermerthyn.
1549. Sir T. Smith, Exam. W. Wycherly (MS. Lansd. 2), fol. 26. He hath used the crystal to invocate the sprat called Scariot , which sprat hath given him knowledge an hundred time.