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Phrasal Verbs

act up

This page is about the phrasal verb act up

INFORMAL

Meaning

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

Synonym

play up, malfunction

For example

  • 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

Quick Quiz

If your computer's acting up, it's

a. performing very well

b. getting an upgrade

c. not working well

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Contributor: Matt Errey