Slack-Jack

A complete and utterly terrible handjob. One that is simply not worth the time and honestly makes one wonder what the fuck is wrong with with the human being who's head is in your lap.

Brady came back Jones' house and told everyone that Liz gave him the Slack-Jack of the century and he'd rather stick his dick in a pinecone than experience that again.

by SpamoniJones April 6, 2010

Cut me some slack, Jack

This is jive talking, and you shout out this when one of your homies busts a better move than you

"Yo man CUT ME SOME SLACK JACK that move was off the hook!

by BILLY BILO August 29, 2005

jack slack

Very HOT. The best guy you will ever meet.

Jack Slack is very HOT

by Hot guy. March 13, 2019

Slack-a-lack-jack

Slack-a-lack-jack

Means, roughly, "Please endeavor to give me the personal space that i desire while i'm buying, selling, distribting, or using crack cocaine." Old Phoenix (AZ) slang.

Be slack-a-lack-jack, ga'my pipe, ga'my crack!

by East Bay Vinny November 16, 2004

Slacking and Jack

the act of putting something off (usually skipping a class) to go masturbate

Friend 1: "dude where were you? there was a math test that was 90% of our grade!"
Friend 2: "Oh I was slacking and jacking"
Friend 1: "oh ok that makes sense"

by Viperlord#0382 November 25, 2022

Slack jacking

When someone takes over a thread on the Slack messaging app for their own purpose

I was talking to Mark in the update channel in Slack and the entire sales team decided slack jacking would be a good idea to discuss how to sell it.

by FRITGuru September 24, 2025