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 2, 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 December 1, 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 18, 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 9, 2018

slack master

A true man of leisure. It takes some real practice to get good at almost doing nothing while still enjoying yourself to the max.

After Jack won the lotto, he resumed his lifelong slacker quest to become the ultimate slack master -- by "trying not to try".

by Sorbe1 September 9, 2015

Sack Slack

When your balls are hanging extra low.

After getting out of the hot tub I had some major sack slack, and your mother loved it!

by bigdaddyfatsacks January 26, 2010