pipe dream

pipe dream  {n.},  {informal}
An unrealizable, financially unsound, wishful way of thinking; an unrealistic plan.
Joe went through the motions of pretending that he wanted to buy that $250,000 house, but his wife candidly told the real estate lady that it was just a pipe dream.
Compare: PIE IN THE SKY.
Categories: informal noun
Source: A Dictionary of American Idioms

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