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

1.
actuar, fingir
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.
Ella solo estaba actuando para llamar la atención.
•
Don't believe him, he's always putting on an act.
No le creas, siempre está actuando.