Dysphemism for the motorcycle coined by doctors,
nurses, and ER personnel who have learned that motorcycles
provide a reliable source of dead organ donors.
Some doctors might cynically appreciate having a fresh heart to give to
the dying child in the transplant ward, but often they're frustrated by the task of trying to sew these people back together.
Patients do live sometimes, though; in such cases, donorcycles serve
as a wonderful source of income for physical
therapists and neuropsychologists who study the
effects and treatment of head injuries. I can't count the
number of case studies I've read that begin "Mr. X is a 24-year-old man
who was riding his motorcycle without his helmet when he lost control
and flew off headfirst into a tree." The scientific literature owes a lot to these people.
Hey, it's your life--live it however you want--but know
the risks.
Drive safely.