What is the Meaning of ACT UP?
not work properly, for machines and body parts
- I couldn’t print the photos. My printer was acting up and kept printing everything crooked.
- I won’t go running this weekend. My knee is acting up again.
misbehave – for people
- “My son’s teacher phoned us. He has been acting up in class.
Note: This phrasal verb is often used with forms that take the present participle – which emphasizes activity.
|present participle:||ACTING UP|
|past participle:||ACTED UP|