When you are mentally and/or physically drained from sending, threading, and replying to large amounts of slack messages through out the day.
by guavajuice0923 September 27, 2022

(Something I made up for a FB post) Slack is the sound you make when you licking on a pussy fast and make a slup sound in the wind sounding like “slack”.
Please don’t make this viral….I have no common sense…
Woman: Mans(or woman) in the black, come slack this cat.
Man(Woman): *slacks the cat” 😂
Woman: Mans(or woman) in the black, come slack this cat.
Man(Woman): *slacks the cat” 😂
by Tatiuna Crawford. December 4, 2021

Bill was thinking about a new project idea while on the move. He quickly opened his mobile Slack app and sent the idea to his team. Later, in an email, Bill asked his team whether or not they had viewed his slack-umentation.
by 2mas2 May 20, 2018

You just ate that food with no bev, you’re odee slack.
I know you don’t have on the same draws from 3 days ago, that’s so slack.
I know you don’t have on the same draws from 3 days ago, that’s so slack.
by DBlockk021 September 16, 2020

by Pimp Tyrone October 12, 2021

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.
by batistaxxx2 October 23, 2020

The deceased was found to have succumbed to slack jam while trying to dress for his friends wedding.
by peggi May 22, 2011
