(N.) A tiddie gap, sometimes referred to as titty gap, is a term used to define a pronounced space created by the sternum found between the pectorals/breasts on the chest of some human males or females. Tiddie gaps are genetic, can very in size and severity and are generally considered harmless, although some complain that they are a aesthetic or athletic handicap.
In their original paper, Nelson and Phelps (1966) developed the concept of “technological gap”, defined as the percentage difference between the technology operated by the typical machine in the economy and the one embodied in the leading-edge machine.
The technologygap between Nokia phones back in the day when smartpho.nes came about had destroyed Nokia's title of "king of cell phones".