split up

nouns

an increase in the number of outstanding shares of a corporation without changing the shareholders' equity
"they announced a two-for-one split of the common stock"

verbs

get a divorce; formally terminate a marriage
"The couple divorced after only 6 months"
separate into parts or portions
"divide the cake into three equal parts"; "The British carved up the Ottoman Empire after World War I"
discontinue an association or relation; go different ways
"The business partners broke over a tax question"; "The couple separated after 25 years of marriage"; "My friend and I split up"
become separated into pieces or fragments
"The figurine broke"; "The freshly baked loaf fell apart"