The Collaborative International Dictionary of English v.0.48:
Roisterer \Roist"er*er\, n. A blustering, turbulent fellow. [1913 Webster] If two roisterers met, they cocked their hats in each other faces. --Macaulay. [1913 Webster]WordNet (r) 3.0 (2006):
roisterer n 1: an especially noisy and unrestrained merrymaker