noun, slang ·Moderate ·College level

Definitions

Noun

1. 1
   A robber; a carjacker. colloquial

   "Lookin' in my mirror, not a jacker in sight"

2. 2
   One who hunts at night using a jacklight. archaic
3. 3
   A Cornishman. Cornwall
4. 4
   A computer hacker or pirate. colloquial

Synonyms

All synonyms

beatercoursercousin jackdrifterfishermanhunter

Example

More examples

"Lookin' in my mirror, not a jacker in sight"

Etymology

Etymology 1

From jack + -er.

Etymology 2

See jacklight + -er.

Related phrases

jacker-off

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.