Slack-Ass 

Someone who persistently has a inadequate work ethic and repeatedly refuses to improve.

Teacher: Hey, Rahul why isnt your work done?
Rahul: I didnt feel like doing it.
Teacher: You're a damn slack-ass.

Slack-Ass by CaptainDoctor April 23, 2009

slack master 

The king of slack, taking pleasure on overdosing on Vitamin D(milking), white mustache, where’s the cookies, got milk. Synonyms: Sanwald

Steve is a real slack master.

slack master by Jeraco70 September 28, 2008

slack dog 

an incorrigible slacker whose only viable function is to waste oxygen; a generally useless individual

Why don't you get a job slack dog? or Get to work slack dog! Why did you eat the rest of the food without asking slack dog!

slack dog by Owen3 May 22, 2006

slack-jam 

The result of improper or hasty removal of one's pants. Slack-jam typically occurs when the shoes, especially lace-ups, are not removed prior to removal of the pants.

1. In his haste to slip into something more comfortable, he required the help of his room-mate to extricate his shoes and feet from his pants in a rather nasty example of slack-jam.

slack-jam by Topmounter January 25, 2008

slack yac 

crazy crack head who is a down homie

i was going to ask that guy to buy me a 40oz untill i saw he was a slack yac and was under age

slack yac by frisk-kfc April 23, 2009

slack-a-lackin 

wasting time, procrastinating, putting things off

I thought that was done, your slack-a-lackin!

slack-a-lackin by spazz82 April 8, 2015

slack fanny 

In Devon (West of England), an idle, slow and incompetent person who is no use to man nor beast. Just like a slack fanny (whether British or American), someone who does a poor job of whatever they are meant to be doing.

'That Pete's such a slack fanny. Three bloody years I've been waiting for him to look at my roof.'

slack fanny by mockschmock December 9, 2006