jacker

noun4

1. •
   (informal) A robber; a carjacker.

   • You drive a M5 down a township street, ten jackers roll you for the ride. — 2013
2. •
   (informal) A computer hacker or pirate.
3. •
   A Cornishman.
4. •
   (no longer used) One who hunts at night using a jacklight.