The Collaborative International Dictionary of English v.0.48:

Jigjog \Jig"jog\, a.
   Having a jolting motion.
   [1913 Webster] Jihad

The Collaborative International Dictionary of English v.0.48:

Jigjog \Jig"jog`\, n.
   A jolting motion; a jogging pace.
   [1913 Webster]