What does it mean?

In Texas they talk of someone not knowing "Jack Shit".

On Google this is what it says about Jack ...."What does it mean when someone says you dont know jack? - The "jack" part of this phrase means "nothing" and comes from the use of the name Jack to refer to an everyday man. ... What's interesting about the expression "you don't know jack" is that it means the same thing as "you know jack." Both phrases mean you don't know anything. 8 Mar 2020"

That's polite, but when it comes down to dealing with fools, well, Texans are blunt and to the point, and here's what Google reports from the Urban dictionary about that same question: "jack shit - Nothing, or something equivalent to nothing. Jack shit has the remarkable property that its absence and presence are identical. Typically used with or without a negative to describe a total lack of knowledge, value, or significance. Its use carries a strong negative connotation which can express frustration, disdain, ignorance, or other negative qualities. I don't know jack shit about that. / I know jack shit about that. It's worth jack shit. / It isn't worth jack shit. I didn't get jack shit. / I got jack shit."

So here is "Jack Shit" on Garry's Forum today .... "Posted by Jack on December 10, 2021, 9:38 am, in reply to "Re: More malevolent falsehoods from MH  - I have made two suggestions to Hagger. The first relating to his editing process was accepted. The second, advising him to stop slagging everyone off and grow up, was not......"

Now how we know that Jack is really "Jack Shit" is because a) he didn't tell Hagger anything. He accessed a proof-reader' forum and made his first comment which conformed to the requirements of the forum and so it was accepted with thanks. Then b) - Jack decided to reveal himself as Mr Shit and posted a rude second comment on the same forum. Because it was simply a rude comment it was deleted before it was posted. Neither comment was addressed to Mr Hagger, so Jack Shit, like Paul Rusling just lied.

But the question is this: If Jack is not Jack Shit, then who is he? He is obviously a coward because he cannot reveal his legal last name, and he obviously knows nothing and therefore, any reasonable person might be forgiven if they suspect that his real last name is either Shit or yet another adopted name for Mister Custard Bowl Haircut, none other than Paul Alexander Rusling who started the thread that Mister Shit has just posted upon.

However, please, please don't stop because our readership is zooming higher and higher due to the sane people who stumble across the insane Rustling's rubbish and then wonder what it is that he is so afraid of and why does Garry Stevens praise us to the hilt and tell us to dish it out to the trolls like Jack Shit? So they come over to 'Yesterday Never Happened' to discover the true story for themselves. Then they tell their friends who also come over and read the real story. Then those friends tell other friends ....

So keep up your promotion guys, and Tesco agrees that "every little helps!"