0 When children play up, they behave badly: --
The boys have been playing up at school again.
1 If a machine plays up, it does not work as it should: --
The starter motor was playing up again.
2 to behave or operate in a way that causes difficulty: --
Is your ulcer playing up again?
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
play up