"So I mashed potatoes over to Bobby..."According to Wikipedia:
The dance begins by stepping backward with one foot with that heel tilted inward. The foot is positioned slightly behind the other (stationary) foot. With the weight on the ball of the starting foot, the heel is then swiveled outward. The same process is repeated with the other foot: step back and behind with heel inward, pivot heel out, and so on. The pattern is continued for as many repetitions as desired. The step may be incorporated in various dances either as a separate routine or as a styling of standard steps.Try it!