stir up
phrasal verbstir somebody  up 
- to encourage somebody to do something; to make somebody feel they must do something
 
stir something  up 
- to make people feel strong emotions
- to stir up hatred
 - Going back there stirred up a lot of memories for her.
 
 - to try to cause arguments or problems
- to stir up a debate
 - Whenever he's around, he always manages to stir up trouble.
 - We've got enough problems without you trying to stir things up.
 
 - to make something move around in water or air
- The wind stirred up a lot of dust.