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

1.
老員工, 擺設
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.
在這裡工作了二十年後,約翰已經成了老員工。
•
The old clock in the corner has been there so long it's just part of the furniture.
角落裡的那座老鐘在那裡放了太久,已經成了擺設。