slack 

Only used in Birmingham and Solihull area. Slack is when something is harsh. It can be used in many different ways.

Ben - "check out that boy, he's fat"
Ben's friend - "Slack man" or "That was slack"

slack by David D July 3, 2005

slack 

to goof off, to waste time, to waste your whole life

I dropped out of college, gonna just slack for a year or 2.

slack by Anonymous November 8, 2002

Slack 

Australian slang used alot lately showing someone not interested in doing something, or one who is lazy.

Robert: Hey lets go to the shop
Sam: Naa, slack!

Slack by Karina September 9, 2004

Slack 

Something that is disgusting, unpleasant, and offensive to the eye.

Just down-right nasty!!

"Oh my damn"!! Why in the hell did that girl put on that!!!!! She looks so SLACK!!!

2) Lets say that some1 dose something nasty. and You say
"yo SLACK ass!!!

3) When you hear something that is Nasty. you say
"Awww that sounds Slack!!"

Slack by Luv 2Shady December 28, 2005

slack 

absence of rules . . . wholly grail for a Subgenius

"Cut me some slack . . . Jack"

slack by CruiserBob November 1, 2008

slack 

The absence of rules. Especially dogmatic or stupid rules that constrict freedom in modern humans. Slack in it's purest form is freedom.

Give me some slack . . . Jack!

slack by Vidaddy January 13, 2009

slack 

Slack can be a short of SLACKWARE,
Slackware Linux, the kernel or operating system or os.

www.slackware.com

Slackware is the greatest Linux distribution ever!

- Are u using windows xp?
- Yeah :-(, it can't be any worse! How about u?
- Well, I'm using Slackware Linux! It doesn't blue screen like windows! HAHA Windows Sucks!
- Yeah it really does!

slack by POE December 23, 2003