jack the slack

To masturbate, aka to jack off, jerk off, burp the worm
by EpicEric26 January 18, 2018
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Off of Slack

When a person does something just to do it.
Person 1: Why are you cleaning your shoes?..They're already clean.

Person 2: SMT -_- I'm doin' this off of slack boy...chill!!! :|
by Ann-Nisa October 28, 2009
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Slack knob

Someone who is continually done over by women
Gilbert always gets done over by his women, what a slack knob!
by B shift oxford February 29, 2020
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Slack Lining

A business maneuver in which an employee continually sends insubordinate emails to his/her boss with the intent of embarrassment and or emasculation. Similar to the outdoor practice of slack lining it can be risky and carry with it the complete destruction of one's career.
John was really slack lining when he sent his boss an email with all the ways he had misinterpreted the sales data, luckily he copied the CEO on the email and his boss was later fired.
by Martin Kaan February 13, 2015
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Called in slack

To phone or email your place of work with an obvious fabrication, saying you can't come in.
Hey, Manfred called in slack. He said his garage burned down again ...I heard empty beer cans knocked over in the background while he mumbled.
by Anonymus Bosch June 28, 2006
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wank slacks

A pair of trousers (usually an old pair of jogging bottoms with an elastic waistband) in which a male can comfortably masturbate whilst wearing, thus creating warmth on a cold night without the need for a duvet or blanket.

Called fap slacks across the Atlantic.
"I see mikes got his wank slacks on, guess we know what he'll be doing later!"
by 240490 September 21, 2012
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multi-slacking

Similar to multi-tasking with computers, it involves engaging in a variety of applications on a computer. However, in multi-slacking, this definition is restricted to include one or more of the following: gaming, chatting, listening to music, web browsing (non-educational), hacking, pirating, posting on forums, watching videos, or viewing pr0n.
AP Comp Sci is the perfect chance to practice my multi-slacking skills.
by Vivix July 07, 2004
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