not mean jack shit(redirected from don't mean jack shit)
not mean jack shit
rude slang Not having any meaning or value whatsoever. Yeah, well, Dad's promised us stuff before and not followed through. His promises don't mean jack shit. I finished my paper, but it won't mean jack shit if I can't hand it in because this isn't printer working!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.