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Vocabulary : Slang : J : jack (2) | jack shit

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jack (2) | jack shit American English

Meaning: nothing; very little

For example:

  • Why don't you get out of the house and do something? You've been sittin' around doin' jack all day.

  • Don't listen to John. He knows jack shit about how the economy works.

Note: often used in the phrase "know jack about (sth.)" or "know jack shit about (sth.)"

Variety: This slang is typically used in American English but may be used in other varieties of English too.

Quick Quiz:

"That guy Kenny knows jack about playing poker." He knows
  1. nothing about poker
  2. everything about poker
  3. something about poker

Discuss: jack (2) | jack shit

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