supplejack noun4 •Any of various North American vines that have supple stems. •Any of several vines belonging to the genus Ripogonum, native to New Zealand. •A cane made from such a plant used as a walking stick or as a whip.Above all, knock the first of them down who is insolent, and thrash any of them who are disobedient with a supplejack. — 1895 •A child's toy in the form of a man with jointed limbs controlled by a string; a jumping jack.and his body spread out as usual in his favourite position of a supplejack distorted to the utmost — 1854 formssupplejacks