Top Definition
When your Ladyfriend, boyfriend, ho, or other sexual servant gives you a handjob while sitting 'bitch' on your Motorcycle or Scooter.

Similar to Road Head for a car or truck.
I'm pretty tired man, my lady friend gave me a nice long motojack on the ride over.

Sorry officer, I lost control because I was getting a motojack.
by elcalrissian April 13, 2010
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