Act Acting Meaning Part Body Piece Equipment Work

Meaning: If a part of your body or a piece of equipment acts up, it doesn't work properly.

• act up My printer is acting up, so I'll have to get it fixed.
  
  
• act up I'll have to give the tennis a miss this week. My knee is acting up again.
  
  

Nouns often used as subjects with act up: computer, printer, phone, air conditioner, knee, wrist, ankle, stomach