Leapfrog - Definition
leapfrog
n 1: advancing as if in the child's game, by leaping over
obstacles or competitors; "the company still believes the
chip is a leapfrog in integration and will pay huge
dividends"
2: a game in which one child bends down and another leaps over
v 1: jump across; "He leapfrogged his classmates"
2: progress by large jumps instead of small increments