Jacking

What does JACKING mean?

Jacking is a form of JACK.

1. noun

   a small worthless amount

   “you don't know jack”

2. noun

   a man who serves as a sailor

3. noun

   someone who works with their hands; someone engaged in manual labor

4. noun

   immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted

Definitions from WordNet 3.1, Princeton University.