An adjective that describes any orifice that has seen copious amounts of penis or similar object (e.g. broom).
Alan: Good Lord! Your bumhole is extraordinarlily slack, I doubt my penis would even touch the sides.

Jill: What can I say, I like penis.
by DaftusCuntus September 27, 2009
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Being slack is a new way of dogging let's say someone said you could have last beug then they had it, that would be pretty slack
sketch guy 1: oi bruzzy got any spin
sketchy guy 2: nah sorry bro

sketchy guy 2 pulls spin out of his bag

sketchy guy 1: that's just slack as man
by Uncle Andos July 5, 2017
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To not get your dick up; not have a boner.
"She looked down and this cock was totally slack"
by Johnny Luna January 24, 2014
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Normal state for a wordTech/word. Generally regarded by the IT community at large as a good thing.

"I dont work, I'm in IT"
I'm getting paid to slack off at work all day.

IRC is great, it allows me to look like I am working when I am really slacking like a pro
by Cabe June 18, 2003
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Sumtin that's beat or not of good quality. Sombody that's poor or broke.
by LiL'Nappy Jones February 21, 2005
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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 14, 2004
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