part of the furniture
US /pɑːrt əv ðə ˈfɜːrnɪtʃər/
UK /pɑːrt əv ðə ˈfɜːrnɪtʃər/

1.
parte da mobília, figura carimbada
a person or thing that has been in a place or situation for so long that they are considered a permanent, unremarkable, or indispensable feature of it
:
•
After working here for twenty years, John has become part of the furniture.
Depois de trabalhar aqui por vinte anos, John se tornou parte da mobília.
•
The old clock in the corner has been there so long it's just part of the furniture.
O relógio antigo no canto está lá há tanto tempo que é apenas parte da mobília.