The term INVERTED SIX is a type of figure skating jump, which is also known as a 'backflip'. It is a difficult jump to perform, as it requires the skater to take off from the back outside edge of one foot, rotate in the air, and land on the back outside edge of the other foot. The term INVERTED SIX is derived from the number of rotations that the skater must complete in the air, which is six.