"Buttplug" is more fun, easier to say, and pleasantly irreverent compared to terms like "thumb drive", "flash drive", "jump drive", or "USB drive". It's shape, colours, optional tassels, and method of use is casually reminiscent of the term's literal namesake.
This new application of the term "buttplug" was coined by the members of an environmental non-profit on Haida Gwaii, Canada and its use has spread among professionals on island, and has also taken root in the University of Victoria, Canada geography labs, presumably through a professional contact. Its use locally is so widespread as to warrant nary a raised eyebrow, except with new-comers.
"Can I borrow your buttplug to copy some photos to my laptop?"
"You can insert your buttplug only if it doesn't have any viruses on it."
True Story: While at a meeting with provincial government representatives, a local professional was accessing files on his USB drive, resulting in the LCD projection screen to announce to the crowd of collected people "Inserting Buttplug"; a variety of grins, grimaces, and quizzical looks resulted.
Any relatively large object -- usually made of rubber -- that can be firmlythrusted into one's butt, which in turn engenders a strong feeling of euphoria.
"Holy Shit! That buttplug you just inserted into my anus felt so good it should've been illegal!"
This is a dowel inserted in the anus in order to dilate it so it becomes more adequate for anal intercourse. According to some sources, it was very common in the 18th century.