bust-up

from WordNet (r) 3.0 (2006)

bust-up
    n 1: a serious quarrel (especially one that ends a friendship)

from The Collaborative International Dictionary of English v.0.48

bust-up \bust-up\ n.
   a serious quarrel (especially one that ends a friendship).
   [WordNet 1.5]

         With some antick bustoes in the niches.  --Ashmole.
   [1913 Webster]