go slack 

To take up the slack. To pull in or make taut a loose section of a rope, line, wire, etc.

verb

1. to make tighter, or more tense or taut, as a rope; remove slack;

Cason noticed slack in the tow rope and yelled, "go slack".

go slack by Dingjob March 20, 2013

Hit the sack and go to bed

To masturbate before going to sleep

Hey man, it's been fun tonight, but I'm going to hit the sack and go to bed

Hit the sack and go to bed by Omega Potato February 18, 2019

hit the sack... and then go to bed 

A declaration used in parting from company when one is about to retire for the evening to sleep, but not before masturbating.

In delivery, there should be a slight pause between "sack" and "and" to emphasize that what was implied by the first statement was not what was actually intended.

Me: Well, guys... I oughta be getting along. Time to hit the sack... and then... go to bed.

My Company: (moment of dawning... laughs and jeers)

hit the sack... and then go to bed by J Monty Rivers December 26, 2003