Definition
Acting up is a versatile phrasal verb that primarily describes behavior or function that deviates negatively from the expected norm. In one common sense, it refers to misbehaving or behaving badly, particularly by children, pets, or individuals who are being unruly, disobedient, or causing trouble and disruption. This usage implies a deviation from good conduct or decorum. Secondly, it is frequently used to describe a malfunction, faulty operation, or improper functioning of a machine, device, or system. This could range from a car engine making unusual noises, a computer freezing unexpectedly, or an appliance not working as it should, indicating a technical issue that requires attention. Thirdly, it can be employed to describe the worsening or recurrence of a physical condition, illness, or pain, such as an old injury flaring up, an allergy manifesting symptoms, or a chronic ailment becoming more troublesome or painful. Across all contexts, 'acting up' generally conveys that something is not performing or behaving as it normally should, often leading to annoyance, inconvenience, or concern.
Examples
# | Examples |
|---|
| 1 | The kids started acting up as soon as their parents left the room. |
| 2 | My old car engine has been acting up, making a strange knocking sound. |
| 3 | After a long day of hiking, my knee injury from college started acting up again. |
| 4 | The computer system has been acting up all morning, causing delays in our work. |
| 5 | If the dog keeps acting up like this, we'll have to consider more training. |
| 6 | Her allergies always start acting up during the spring season. |
| 7 | The printer in the office has been acting up, constantly jamming paper. |
| 8 | Despite several warnings, the students continued acting up in the back row. |
| 9 | I couldn't finish the report because my internet connection was acting up. |
| 10 | My back often starts acting up after a strenuous session at the gym. |
