pipe dream (paipu dorīmu)

Idiom Dreams

意味

an unrealistic or impossible hope

非現実的または不可能な希望 (higenjitsututeki mata wa fukanou na kibou)

例文

"Becoming a billionaire overnight is just a pipe dream."

"一晩で億万長者になるのはただの夢物語です。" (hitoban de okumanchouja ni naru no wa tada no yumemonogatari desu.)