play up

US /pleɪ ˈʌp/
UK /pleɪ ˈʌp/
"play up" picture
1.

出毛病, 不正常運作

If a machine or part of your body plays up, it does not work correctly.

:
My car's been playing up all week.
我的車這週一直出毛病
My knee always plays up in cold weather.
我的膝蓋在寒冷天氣裡總是出問題
2.

搗亂, 胡鬧

If a child plays up, they behave badly.

:
The children started playing up as soon as their parents left.
孩子們一等父母離開就開始搗亂
He's been playing up all day, I don't know what's wrong with him.
他一整天都在搗亂,我不知道他怎麼了。