rascally

adj

1. Like a rascal.

   “He was speedily reassured, and with a large, white, rascally grin, and a glance at his charge, seemed to take me into partnership in his exalted trust.”

   “My chief creditor is, unhappily, my most bitter enemy—a rascally fellow, Sam Brewer, whom I was once compelled to horse-whip on Newmarket Heath.”

adv

1. In the manner of a rascal.

   ““I hope,” said Jones, “you don’t intend to leave me in this condition.” “Indeed but I shall,” said the other. “Then,” said Jones, “you have used me rascally, and I will not pay you a farthing.””