Act up

usgb
verb

To behave badly or not work properly.

My computer is acting up again, I may need to take it for repair.
Visual representation of "act up" - To behave badly or not work properly

Often appears as...

  • computer acting up
  • car acting up

Usage tips

Colloquial

Definition 1 of 2
Visual representation of "act up"
LampPro Tip 1/3

Technical Trouble

Use 'act up' for gadgets or machines causing frustration due to malfunctions.

Illustration for Technical Trouble
If your printer starts acting up, try restarting it before calling support.
LampPro Tip 2/3

Mischievous Behavior

'Act up' often describes children or animals misbehaving in a playful but troublesome way.

Illustration for Mischievous Behavior
Whenever there's a full moon, the kids in my class tend to act up more.
LampPro Tip 3/3

Non-serious Context

'Act up' isn't generally used for serious or criminal behaviors, only for minor disruptions.

Illustration for Non-serious Context
My phone's acting up, it keeps dropping calls today.
Visual representation of the word "Act up"

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