Define Slackness Meaning

1. One's level of sexual looseness or skill.

unwaranted perverse behavior

This is a nickname that uses reverse psychology on the classic word "Slacker" -as in to be lazy.
"Slack" is the most AWESOME word you can use to describe a person and has been developed to change expectation by subterfuge.

An adjective much like chill, showing approval, contentment, or mild amusement.

In the theology of the Church of the SubGenius, a mystical substance or quality that is the prerequisite of all human happiness.

gimme some space, dont nag etc

adult meanings: slacking, not working/ being active etc

In the context of reggae music 'slack' has to do with lyrics being lewd, vulgar or sexual.

For a SubGenius, Slack can be anything you get or enjoy out of life that you don't have to work for or pay for , an approach where one stops trying to make things happen or exert control, and instead simply "allows" or "lets" favorable events to occur. Everyone is born with Original Slack, an ideosyncratic harmony with the flow of life which the unwitting Conspiracy of Normality is unceasingly trying to trick us into giving up, often as a Con-job in exchange for False Slack (anything you're sold or conned into that you have to work for or pay for, or the obligation of working or paying for it).

Has nothing to do with "slackers" or college or hip indie movies of the nineties. Is the secret ingredient of the Universal Solvent, the Holy Grail, the true goal of all mystic beings.

To masturbate, for men.