act up
US
UK act up vi phrasal: UK, informal (child: misbehave)
SC 捣蛋 dǎo dàn
SC 调皮 dǎo dàn，tiáo pí
TC 調皮
TC 調皮
Why do children always wait to be in public to act up?
为什么孩子们总是要等到公共场合才捣蛋？
act up vi phrasal: informal (machine: malfunction) (机器)
SC 出毛病，运转失灵 chū máo bìng，yùn zhuǎn shī líng
The TV is acting up, but I think it's just a loose wire.
这台电视机出毛病了，不过我认为，可能只是哪根电线松了导致的。
act up vi phrasal: UK (stand in for [sb] more senior)
SC 暂替 zàn tì
SC 顶替 zàn tì，dǐng tì
Lily was asked to act up for the six months that her manager would be away.
clean up your act v expr: informal (behave properly)
SC 改邪归正 gǎi xié guī zhèng
SC 洗心革面
warm-up act n: (performer: before main act)
SC 暖场演出
TC 暖場演出
TC 暖場演出