Roister \Roist"er\, v. i. [Probably fr. F. rustre boor, a clown, clownish, fr. L. rustucus rustic. See {Rustic}.] To bluster; to swagger; to bully; to be bold, noisy, vaunting, or turbulent.
I have a roisting challenge sent amongst The dull and factious nobles of the Greeks. --Shak.