In the theology of the Church of the SubGenius, a mystical substance or quality that is the prerequisite of all human happiness.
I read the Book of the Subgenius to find true slack in life.

"Give me liberty, or give me slack"

The CON took away all my slack.

That makes me unhappy, that's not slackfull.

Slack is the perfect hamburger...

Slack is feeling damn good, and everything goes your way.

"Slack" is a way of life.
by Doktor Agon Fly January 13, 2004
A preferable way to describe trousers, pantaloons, dress pants, etc.
Yo, that chick was digging my slacks!
by superdawg90 June 14, 2011
loose fitting, broken, loose stitch
"slack tight"
by Noixz January 15, 2009
Pants that are especially prone to an unwanted crotch tent
I had to wear slacks to prom, and when she kissed me i think she noticed my crotch tent
by Brobacca May 15, 2011
Verb: to walk a slackline
Wanna slack a little?
by Adam Pudliner July 29, 2006
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.
Dude! You are soooo Slack!!!!!!!!
by James Russell November 23, 2004
Can Refer to a female who is realy Attractive or it can refer to sex.
Wow check out that slack dude!

If she is making me take her out to dinner she better bust out the slack later man.
by Marz13 April 23, 2008

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