The Collaborative International Dictionary of English v.0.48:
Rumpus \Rum"pus\ (r[u^]m"p[u^]s), n. A disturbance; noise and confusion; a quarrel. [Colloq.] [1913 Webster]WordNet (r) 3.0 (2006):
rumpus n 1: the act of making a noisy disturbance [syn: commotion, din, ruction, ruckus, rumpus, tumult] v 1: cause a disturbance