Jack(son) shit

Slang: vulgar (British, used exclusively by the Jackson clan)

Nothing at all.

Affronted person: What's wrong with you?
Felicity: Jack(son) shit!

by A-concerned-citizen April 27, 2021

Jack diddly shit

Means "Absolutely nothing"

He was doing Jack diddly shit

by AlchemicBlue April 28, 2025

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

Jack Shit Off

To copy something

They love to jack shit off to make their project look better!

by Felix1999 September 2, 2022