A rapid mover; someone who scrambles. "Scramblers can often unnerve a better tennis player"
2.
A lightweight motorcycle equipped with rugged tires and suspension; an off-road motorcycle designed for riding cross country or over unpaved ground. Synonyms:dirt bike, trail bike.
3.
Electronic equipment that makes speech unintelligible during transmission and restores it at reception.
... other men, or that nations prosper by depriving other nations of prosperity. That would be true if riches consisted of money, and if there were just so much money and no more in the world. Then business and finance would be a scramble, in which the roughest and strongest scrambler would get most. ... — Gossamer - 1915 • George A. Birmingham