put on an act
US /pʊt ɑn ən ækt/
UK /pʊt ɑn ən ækt/

1.
udawać, grać
to pretend to be someone or something that you are not, or to pretend to feel something that you do not feel
:
•
She was just putting on an act to get attention.
Ona tylko udawała, żeby zwrócić na siebie uwagę.
•
Don't believe him, he's always putting on an act.
Nie wierz mu, on zawsze udaje.