Delivering an electronic copy by walking from one computer to another, using a disk (archaic) or a thumb drive.
Ethelbert copied the term paper to his thumb drive, walked to the Profesor's office while wearing his new sneakers, and delivered the file using sneaker mail to the Professor's computer because the Prof did not know how to use e-mail and snail mail is too slow.
by CableHills December 20, 2006