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Act up

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LampPro Tip 1/3
Technical TroublePlay
Use 'act up' for gadgets or machines causing frustration due to malfunctions. SlideIf your printer starts acting up, try restarting it before calling support.
LampPro Tip 2/3
Mischievous BehaviorPlay
'Act up' often describes children or animals misbehaving in a playful but troublesome way. SlideWhenever there's a full moon, the kids in my class tend to act up more.
LampPro Tip 3/3
Non-serious ContextPlay
'Act up' isn't generally used for serious or criminal behaviors, only for minor disruptions. SlideMy phone's acting up, it keeps dropping calls today.