split up

noun

1
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

1
become separated into pieces or fragments
The figurine broke
The freshly baked loaf fell apart
2
discontinue an association or relation; go different ways
The business partners broke over a tax question
The couple separated after 25 years of marriage
3
separate into parts or portions
divide the cake into three equal parts
The British carved up the Ottoman Empire after World War I
4
get a divorce; formally terminate a marriage
The couple divorced after only 6 months

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