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to act up
[phrase form: act]
01
to cause regular discomfort or pain, often related to a physical illness or health issue
02
to behave in an improper manner, often disregarding rules or social norms
03
(of mechanical devices, technology, or equipment) to not work properly
04
to be temporarily assigned to a higher position within an organization or role
act up
v
Example
The arthritis in his hands acts up more during cold weather.
His old knee injury acts up every time it rains, causing him pain.
I can't play sports right now because my ankle is acting up again.
When her back starts acting up, she has trouble with daily activities.
Stress can make chronic conditions act up, so it's important to manage it.
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