white elephant
idiom

A costly and useless possession that is hard to get rid of
  • 1The old mansion became a white elephant after the family moved out.
  • 2The new stadium turned into a white elephant when the team relocated.
A white elephant is something expensive that you own but don't need or want. It's hard to sell or give away because it's not useful to anyone. It's like having a fancy, but useless, item that you can't get rid of.
Card
Remember, just because something is expensive doesn't mean it's valuable to you. Before buying, ask yourself if it's truly necessary or if it might become a "white elephant" in the future.
at the laundromat
The Unwanted Gift
Susan
I finally got rid of that treadmill in my garage.
Laura
Oh, was it that bad?
Susan
Yeah, it was a real white elephant.
Laura
I know the feeling, I had a bread maker like that once.
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Similar to "white elephant":
  • 1burden
  • 2liability