someone coined it for the tommy hearns jab. the idea is that it has a bit of back hand to it. instead of your fist going from shoulder to face in a line it goes slightly to the side to drag and snap your face...more cuts and can be chambered more effectivly. the chamber is a arm that half crosses your waist. it's also a good counter for pawing as you are messing up there timing and placing. becuase it is quick and snappy so they cant throw the right hand behind the pawing jab. but to be honest im sure people only know about it becuase of hajime no ippo
