jack the slack

To masturbate, aka to jack off, jerk off, burp the worm

Will Jack jack the slack tonight?

by EpicEric26 January 19, 2018

Get the slack out of your jack

Term used to tell someone to quit lollygagging. Can be used to tell someone they are to laid back.

He's been lookin' at magazines for 20 minutes! Our plane leaves in 15. Go tell him get the slack out of your jack!

by Phrisbeephreak July 14, 2010

hit the sack jack

A term used to tell a person to do something or leave a certain place. This term was first developed when a super scientist changed the channel, which his grandson was watching, on the television.

Son: Hey! I'm watching TV!
Grandfather: Hit The Sack Jack!

Son: I don't know if i should ask her out Rick.
Grandfather: Hit The Sack Jack!

by Mattanian May 29, 2017