shake up (third-person singular simple present shakes up, present participle shaking up, simple past shook up, past participle shaken up)
- (transitive) To agitate by shaking.
- If you shake up a can of cola and then open, you get an explosion.
- (of a person) To upset or distress.
- Seeing the car accident really shook her up.
- (transitive) To reorganize, to make reforms in.
- The new boss is going to shake things up, so be aware.