Source : Webster's Revised Unabridged Dictionary (1913)

Scrambler \Scram"bler\, n.
   1. One who scrambles; one who climbs on all fours.

   2. A greedy and unceremonious contestant.

Source : WordNet®

scrambler
     n 1: a rapid mover; someone who scrambles; "their quarterback was
          a good scrambler"; "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 [syn: {trail bike}, {dirt
        bike}]
     3: electronic equipment that makes speech unintelligible during
        transmission and restores it at reception