Origin: Old Ghettish
A word used by lads to say that something is unfair.
Lad 1: I lost 60 cents from the World Stock Market Crash.

Lad 2: Life is so slack dogg fo shizz
by Jack De March 01, 2009
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To give a sloppy blowjob to a half-erect penis. When a guy can't get hard but the girl sucks on his loose rope anyways in a messy fashion.
"Darnelle couldn't get it up last night but its coo, I slacked him up anyways"
by batistaxxx2 October 23, 2020
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To give a sloppy blowjob to a non-erect penis. When a guy can't get it up, but the girl sucks on his loose rope anyways in a messy fashion.
"Darnelle couldn't get it up last night bc he was too drunk, but I slacked him up anyways"
"Wow, what a good person you are!"
by batistaxxx2 October 23, 2020
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To give a sloppy blowjob to a non-erect penis. When a guy can't get it up, but the girl sucks on his loose rope anyways in a messy fashion..
"Darnelle couldn't get it up last night bc he was too drunk, but I slacked him up anyways"
"Wow, what a good person you are!"
by batistaxxx2 October 23, 2020
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A term used when someone or something is annoying boring or just idiotic in general
by Ppmán June 10, 2020
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The ratio of the number of employees in a firm, to the number of Slack channels used by the firm. The higher the Slack Factor, the higher the number of Slack channels per employee, and the lower the possibility of finding that one message you know you just read a minute ago that you needed to respond to.
I just saw a question from Larry, but our Slack Factor is so high, I don't even remember what channel it was in any more. I guess he's not getting an answer.
by Neuticle September 30, 2021
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