The Collaborative International Dictionary of English v.0.48:

Fracas \Fra"cas\ (fr[=a]"kas; F. fr[.a]`k[aum]"; 277), n. [F.,
   crash, din, tumult, It. fracasso, fr. fracassare to break in
   pieces, perh. fr. fra within, among (L. infra) + cassare to
   annul, cashier. Cf. Cashier, v. t.]
   An uproar; a noisy quarrel; a disturbance; a brawl.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fracas
    n 1: noisy quarrel [syn: affray, altercation, fracas]