| 词组 | act up |
| 释义 | Idiom act up Theme: BEHAVIOR - IMPROPER to misbehave; to run or act badly.John, why do you always have to act up when your father and I take you out to eat?My arthritis is acting up. It really hurts.My car is acting up. I could hardly get it started this morning. Idiom act up 1. to behave badly. Sometimes kids act up because they just want attention. Usage notes: usually used to refer to children 2. to operate badly. My computer began acting up and I lost a whole day's work. 3. to become active. Her allergies acted up when she went hiking in the woods. Usage notes: usually used to refer to a medical condition Phr V act up acts, acting, acted act up slightly informal if part of your body or a machine acts up, it stops working properlyIf my knee starts acting up, I might have to give tomorrow's walk a miss.My car has been acting up again - I must get someone to have a look at it. if someone, especially a child, acts up, they behave badlyAs soon as one of the kids starts acting up, the others follow. British to do a more important job than you usually do for a limited periodJunior staff are frequently required to act up but they don't get paid extra. act up1. Of a person, to behave poorly or inappropriately. If you act up in class, you will be sent to the principal's office. 2. Of a thing, to malfunction or operate incorrectly. My car's transmission started acting up during my commute to work. My phone acted up again this morning; I think I need to take it to a professional. 3. Of a medical condition, to become problematic or troublesome, usually after a period of remission. Jake played football with his friends today, and now his old knee injury is acting up. It's springtime, so of course my allergies are acting up again. act up[for a thing or a person] to behave badly. This car is acting up again. act up1. Misbehave. For example, With an inexperienced rider, this horse always acts up. [c. 1900] 2. Malfunction, as in I'm not sure what's wrong with my car, but the transmission is acting up. In both usages up means "abnormally." act upv. 1. To misbehave: The driver stopped the school bus because the kids were acting up. 2. To cause problems by operating strangely or unexpectedly: The thermostat suddenly started acting up, and now it's always too hot or too cold in here. 3. To become active or troublesome after a period of operating normally: My knee starts acting up when the weather is cold. |
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