1.
If you pack up or if you pack up your things, you put your possessions or the things you have been using in a case or bag, because you are leaving.
They packed up and went home...
He began packing up his things.
PHRASAL VERB : V P , V P n (not pron) , also V n P
2.
If a machine or a part of the body packs up , it stops working. ( BRIT INFORMAL )
In the end it was his stomach and lungs that packed up...
PHRASAL VERB : V P