be my guest
US /biː maɪ ɡɛst/
UK /biː maɪ ɡɛst/

1.
fique à vontade, pode ir
used to give someone permission to do something or to accept an offer
:
•
“Can I borrow your pen?” “Be my guest.”
“Posso pegar sua caneta emprestada?” “Fique à vontade.”
•
If you want to use the computer, be my guest.
Se você quiser usar o computador, fique à vontade.