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.