The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

         I have a roisting challenge sent amongst
         The dull and factious nobles of the Greeks. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Roister \Roist"er\, n.
   See Roisterer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

roister
    v 1: engage in boisterous, drunken merrymaking; "They were out
         carousing last night" [syn: carouse, roister, riot]

Moby Thesaurus II by Grady Ward, 1.0:

56 Moby Thesaurus words for "roister":
   bluff, bluster, bluster and bluff, bounce, brag, bully, carouse,
   celebrate, create a disturbance, create a riot, cut loose, debauch,
   gasconade, go berserk, hector, hell around, intimidate, jollify,
   jolly, lark, let go, let loose, let off steam, make a commotion,
   make an ado, make merry, make trouble, make whoopee,
   out-herod Herod, rage, raise a ruckus, raise a rumpus,
   raise a storm, raise hell, rant, rave, revel, riot, roil, rollick,
   run amok, run riot, run wild, see life, skylark, slang, splutter,
   spree, sputter, step out, storm, swagger, swashbuckle, vapor,
   wanton, whoop it up