play up
US /pleɪ ˈʌp/
UK /pleɪ ˈʌp/

1.
szwankować, dawać o sobie znać
If a machine or part of your body plays up, it does not work correctly.
:
•
My car's been playing up all week.
Mój samochód szwankuje przez cały tydzień.
•
My knee always plays up in cold weather.
Moje kolano zawsze daje o sobie znać w zimną pogodę.
2.
broić, psocić
If a child plays up, they behave badly.
:
•
The children started playing up as soon as their parents left.
Dzieci zaczęły broić, gdy tylko ich rodzice wyszli.
•
He's been playing up all day, I don't know what's wrong with him.
Cały dzień broi, nie wiem, co mu jest.