یادگیری زبان انگلیسی به نوعی جدید

             a pig in a poke(an item you purchase without having seen;a disappointment)

          example: The mail order bicycle that my nephew bought turned out to be a a pig in a poke,and he is now trying to get his money back.

معني فارسي اصطلاح:ندیده چیزی را پسندیدن یا خریدن