jack shit

the feces of a jack, i.e. a jackass. By extension, anything worthless or trivial.

You don't know jack shit.

by bumpie January 23, 2006

Not worth jack shit

Not worth the trouble or the value

That car's not worth jack shit

by iamamanufan January 12, 2011

Square Root of Jack Shit

Absolutely Nothing. See Square Root of Fuck-All , Square Root of Sweet Fuck All and fuck-all squared.

"He knows absolutely the square root of jack shit about food and cooking."
- James May, Former presenter of Top Gear UK, on Richard Hammond.

by [e-mail] January 19, 2016

fuck all jack shit

When there is nothing to care about nothing, a combination of Fuck All and Jack Shit to mean that nobody cares about nothing

John: We literally have nothing to eat and we have no money to eat out.
James: Well fuck all jack shit we'll just use our credit cards to buy food

by coeryxtynt February 09, 2023

you dont know jack shit

you dont know jack shit a word meaning you know nothing or are too stupid to figure it out

dude whats an electric car

man you dont know jack shit you are too stupid to know what an electric car is unless you get ran over by one

by littlejimmie January 24, 2019

Do jack shit

House chores and that kinda shitb

I'm tired of my husband asking me to do jack shit when I was pregnant

by Avril1989 June 20, 2018

Jack-Shit

When somebody knows very little. Often the person will be named Jack.

Jack is a liar, claiming that he knows Jack-Shit!

by prudulentjack August 20, 2022