The original phrase is " send fruit! " , which is what asks travelers submit as entrusted from wherever they are, or what travellers themselves who sent, ask to those who remain; It all depends on where has better fruits. In fact is almost a joke, because in the Argentina of the 19th century and until well into the 40 twentieth; origin of the phrase ) There were orchards by cities, as much you can talk send citrus from the North, or apples from the South, but shipping should be fast, by boat or train. Wagons of travelers were not the most safe to bring perishable food. By the humorous phrase, " send fruit " It became soon to send anything, not even expected to receive. From there the modern meaning, which is to say or do something over which they have no idea, only to meet someone or something even if it is in the form.