shake up

verb4

1. •
   To agitate by shaking.

   • If you shake up a can of cola and then open it, you get an explosion.
2. •
   (informal) To upset or distress (a person).

   • Seeing the car accident really shook her up.
3. •
   (informal) To reorganize, to make reforms in.

   • The new boss is going to shake things up, so be aware.
4. •
   To restore to its original shape by shaking.