In basketball, this is a crossover dribble in which the sudden change of direction causes the defender guarding the ballhandler to fall down. The ballhandler then takes advantage of the fallen defender and drives past him to the basket.
For a crossover dribble to be an ankle breaker, the degree of difficulty of the maneuver performed is irrelevant. While it is true that the most punishing crossover dribble can "break the ankles" of even the most skilled defender, most of the time an ankle breaker happens when the dribbler is facing an inept defender. A simple crossover can be made effective by a defender's lack of footwork.