acts up
Causes trouble suddenly
Acts up describes misbehavior or malfunction.
A child acts up by being disruptive or disobedient: The kids always act up when we have company.
Machines and body parts act up by working poorly or causing trouble: My knee has been acting up lately, The printer is acting up again.
The phrase suggests recurring or situational problems rather than complete failure.
Minor system fault
- breakdownFailure or decomposition
- failureLack of success
- bugCrawling creature or defect
- errorFault in communication
fritz · hiccup · crash · outage · short-circuit · stall · overheat · jam
Mildly disobedient
- defiantOpenly resisting control
- disobedientRefusing to follow orders
- unrulyDifficult to control
- rebelliousResisting authority or control
troublesome · mischievous · wayward · disorderly · impish · bratty · rowdy · disruptive
Protective tissue response
- irritationMild anger or inflammation
- aggravationState of being vexed
- recurrenceReturn of something previous
- symptomIndicator of disease
relapse · episode · outbreak · chronic · arthritis · allergy · asthma · eczema
glitch
Minor system fault
error · fritz · hiccup · crash · outage · short-circuit · stall · overheat · jam · misfire
naughty
Mildly disobedient
- defiantOpenly resisting control
- disobedientRefusing to follow orders
- unrulyDifficult to control
rebellious · troublesome · mischievous · wayward · disorderly · impish · bratty · rowdy · disruptive · tantrum
inflammation
Protective tissue response
- irritationMild anger or inflammation
- aggravationState of being vexed
- recurrenceReturn of something previous
symptom · relapse · episode · outbreak · chronic · arthritis · allergy · asthma · eczema · injury
acts upbehaves
Acts appropriately
cooperates · minds · obeys · settles down · calms down
act, acts, acted, acting, actor, actors, actress, actresses, action