By one's legs and feet, used for walking; traveling by foot. A reference to the shank—the lower leg between the knee and the ankle—and the use of ponies or horses for travel. (Also written as "shanks' mare.") My bicycle fell apart three miles away from home, so I had to go the rest of the way by shank's mare. Unfortunately, with the sedentary lifestyle many lead today, travel by shank's mare has largely become obsolete.