So far as I know, Jazzo, a Hop Skip and a Jump is a reference to the supposed way in which children, when they are happy, blithely progress along the road and oe'r the fields. 'Tis the stuff of children's story-books, I think, rather than an acute observation of young persons; nevertheless, children often do use a gait of that general type, if my own experience of my own progeny (a few years ago, now ) is anything to go by.