Roist or Roist'er1, v. i.
v. i. [Probably from Fr. rustre, boor, a clown, clownish, from Lat. rusticus, rustic.] To bluster; to swagger; to bully; to be bold, noisy, vaunting, or turbulent. [Obs.]
*I have a roisting challenge sent amongst The dull and factious nobles of the Greeks.* Shak.