Knavish

Part of speech: adjective (a.)

1. Like or characteristic of a knave; given to knavery; trickish; fraudulent; dishonest; villainous; as, a knavish fellow, or a knavish trick. "Knavish politicians." Macaulay.

2. Mischievous; roguish; waggish. Cupid is knavish lad, Thus to make poor females mad. Shak.