(slang, vulgar, derogatory) Nothing, (lack of) anything (i.e. lack of anything of value).
I [won't/will] do jack shit for you if you get lost.
No comments yet — say something.
Add your own interpretation of "jack shit".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.