jacker

/JH AE1 K ER0/
noun
  1. 1

    (colloquial) A robber; a carjacker.

  2. 2

    (colloquial) A computer hacker or pirate.

  3. 3

    (Cornwall) A Cornishman.

  4. 4

    (archaic) One who hunts at night using a jacklight.