act up
phrasal verbact up (informal)
- to behave badly
表现不好;捣乱 - The kids started acting up.
孩子们开始调皮捣蛋起来。
- The kids started acting up.
- to not work as it should
出毛病 - How long has your ankle been acting up?
你的脚踝受伤多久了?
- How long has your ankle been acting up?