break up
With or without an object
End a relationship
They broke up last month.
(British) finish for the school holidays
School breaks up on Friday.
Usage
The school-term sense is British. American schools 'let out'.
With or without an object
It can be used with no object, and it can also take one. With an object it is usually separable: turn the volume up, turn it up.
Practise it
Add it to your daily practice or see every verb with up.
Further reading: break up on Wiktionary (CC BY-SA).