Slack arse

Does not mean an unfirm bottom, but it means a person who is very lazy

I had to fire David as he was a slack arse

by Windy28 September 04, 2009

Slack dick

noun. 1. A person (male) that doesn't draw up to the challenge of a female counterpart. 2. Impotent

Slack dick: A male tennis player that fails to cover his partner in a mixed double.

by Hollis Wong and Daniel Mckay January 03, 2009

thumbing it in slack

When a man fails to achieve an erection but is undaunted and proceeds to push his penis into the vagina or more commonly anus and attempts sloppy sex by pushing in his penis with his thumb.

Nathan - Aww man im going to jail. imma be some guys bitch. i hope they are tender and start by thumbing it in slack

by SGTKM November 30, 2010

Slack Wax

The liquid substance produced after intercourse with the male by himself

I was lonely last night and got Slack Wax everywhere

by Zach Wagner January 19, 2009

slack vagina

a loose or un-elasticated vaginal opening that whistles when the wind blows, see also Shawn's mom

That girl had such a slack vagina I had to tie a board to my ass to keep from falling in.

by Anonymous February 19, 2003

slack-up

An offline, asyncronous Stand-up, done on Slack, where each member in a team posts their own update.

Useful for remote teams.

John and Marie are working from home today, and John's connection is crap, so let's do slack-up.

by The Real Mr Fish January 09, 2018

holding slack

the act of creating tension and making situations more uncomfortable

I hate inviting Jake places he always makes things so awkward that dude loves holding slack

by ThatguyP July 09, 2019