Don't know nothing, a person's iq about someone else is 0.
The assistant front end manager, don't know crap about me, she is just another idiot who wants to get me in trouble.
the act of not getting anything
I totally thought I was going to score, but I didn't get jack squat
A pleasant way of saying "Jack Shit" which means nothing. Usually used in reference to possesions or intelligence.
That hobo doesn't have money. In fact, he ain't got jack squat.
there are users on this website who do not know jack squat about writing a good definition.
The act of masturbating while crouched directly over the face of someone that is sleeping. Upon nearing completion, you let out a yell so the sleeping recipient wakes up in horror while you simultaneously finish.
Bill gave his girlfriend a Jack Squat during her evening nap, suffice to say they're not together anymore.
When your friend says something stupid: “Charlie I think you’re onto something. The jackpot of Jack squat.”