The herkie (aka hurkie) is a cheerleading jump named after Lawrence Herkimer, the founder of the National Cheerleaders Association and former cheerleader at Southern Methodist University. It is similar to a side-hurdler and to the abstract double hook, except instead of the bent leg's knee being pointed downward, it should be flat while the other leg is straight in a straddle jump (toetouch) position.
The jump was invented accidentally, because Herkimer was not able to do an actual side-hurdler.[1] Common misspellings include "hurky" and "herky".