\Sup"ple-jack`\, n. (Bot.)
(a) A climbing shrub ({Berchemia volubilus}) of the Southern
    United States, having a tough and pliable stem.
(b) A somewhat similar tropical American plant ({Paullinia
    Curassavica}); also, a walking stick made from its stem.
          He was in form and spirit like a supple-jack, . . .
          yielding, but tough; though he bent, he never
          broke.                               --W. Irving.
Note: This name is given to various plants of similar habit
      in different British colonies.