play up

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

fare i capricci, dare problemi

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

:
My car's been playing up all week.
La mia macchina fa i capricci tutta la settimana.
My knee always plays up in cold weather.
Il mio ginocchio mi fa sempre male con il freddo.
2.

fare i capricci, comportarsi male

If a child plays up, they behave badly.

:
The children started playing up as soon as their parents left.
I bambini hanno iniziato a fare i capricci non appena i loro genitori se ne sono andati.
He's been playing up all day, I don't know what's wrong with him.
Ha fatto i capricci tutto il giorno, non so cosa gli prenda.