Genuinely doing "
jack shit" all day. "Jackshitting" is often referred to as "
procrastinating", but procrastinating implies you actually have something to do, while you
jackshit without having to have a life.
Susie: "James you wanna go paint drying?"
James: "Nah,
I'm okay. I think I'll just
jackshit here on the couch."
Susie: *sigh* "You're always
jackshitting about."